3.55's... 3.54's... Which is it???

[eucharistos]

so is that chinese or japanese?

 

[dave6666]

With my 28" rears and 3.55's (or 3.54's... ) the equivalent ratio is 3.33. That is by design

 

[plumcrazy]

good move dave.

 

[BOTTLEFED]

Oh, Re: the 3.54 vs 3.55, they are the same gear. It's a matter of rounding, as mentioned before.

good to know I was right in the first place

then see what that part number says about that part number.

Whaaaa???

 

[dave6666]

Whaaaa???

Look up specs on specific gear set part number.

 

[ViperTony]

The Viper "Super44" diff is unique to Vipers and certain Corvettes in that the pinion shank, bearings, and pinion spline is actually the size of a Dana 60. The pinion gear and ring gear are standard D44 dimensions. A hybrid, if you will. Regular old Dana 44 gears can be installed, however a sleeve must be welded to the pinion shank of the smaller D44 to make it the appropriate size for the Viper's inner pinion bearing. A new outer bearing, seal and smaller spline yoke must all be sourced as well, resulting in more money for a much weaker rear end.

Beginning in '95-'96 Vipers began to receive larger 7/16" ring gear bolts instead of the smaller 3/8", all else being the same. A few companies have bolt kits with spacers for installing small bolt gear sets onto a large bolt case. If you install a large bolt gear set onto a small bolt case the case holes must be enlarged to accomodate the larger bolt. All gear sets will interchange from '92 to '08.

However, differentials between '92-'02 and '03-06 will not swap. The SRT diff is much wider, and will not fit in the Gen I/II housing. The '08-'09 GKN differential will swap into a '03-'06 SRT housing, but you must buy the axle stubs for the '08-'09, as there is a difference there.

I hope this brings everyone up to speed.

Oh, Re: the 3.54 vs 3.55, they are the same gear. It's a matter of rounding, as mentioned before.

Wow...great info, thanks! So...installing a Dana 44HD 3.54 ring and opinion into my GenII diff is NOT going to work without a lot of work are you described? I ask this because I see vendors that offer Dana 44HD ring and pinion sets for Viper. It sounds like, based on your explanation, that I need to install Dana 60 ring and opinion for a proper fit, correct? Or is Unitrax the only gearset that will work for our diffs?

 

[dave6666]

Just talked to Taylor Race. The gears they are quoting is Dana part number 707381-3X. I have not researched it yet. He's gonna get a tooth count and ring bolt size for me as he has 2 sets on the shelf.

 

[Monzsta]

Wow...great info, thanks! So...installing a Dana 44HD 3.54 ring and opinion into my GenII diff is NOT going to work without a lot of work are you described? I ask this because I see vendors that offer Dana 44HD ring and pinion sets for Viper. It sounds like, based on your explanation, that I need to install Dana 60 ring and opinion for a proper fit, correct? Or is Unitrax the only gearset that will work for our diffs?

If the Dana 44HD is what they're calling the Viper's gearset, you'll be fine. They'll go right in. Regarding the Dana 60 ring and pinion, you misunderstood my explanation. The Viper's Dana 44 only shares the Dana 60's pinion shaft size and spline size. Dana 60 parts won't fit. (Except for the pinion yoke.)

 

[ViperTony]

If the Dana 44HD is what they're calling the Viper's gearset, you'll be fine. They'll go right in. Regarding the Dana 60 ring and pinion, you misunderstood my explanation. The Viper's Dana 44 only shares the Dana 60's pinion shaft size and spline size. Dana 60 parts won't fit. (Except for the pinion yoke.)

Thanks for clarifying for me, that makes more sense. - Tony

 

[Monzsta]

Just talked to Taylor Race. The gears they are quoting is Dana part number 707381-3X. I have not researched it yet. He's gonna get a tooth count and ring bolt size for me as he has 2 sets on the shelf.

That would be good info to know. It is a 29 spline big pinion, so it is for Viper.

 

[Geoff Green]

I thought rear ends had to be an odd number. Are there other rear end numbers beside the 3.54's that are even?

 

[dave6666]

I thought rear ends had to be an odd number. Are there other rear end numbers beside the 3.54's that are even?

Last time I had my hand on a rear end I wasn't thinking about that.

 

[dave6666]

Just got the info on the Dana 707381-3X gear set.

-> 11/39 tooth count, 3/8 ring gear screw diameter.

Comments?

 

[99 R/T 10]

The Viper "Super44" diff is unique to Vipers and certain Corvettes in that the pinion shank, bearings, and pinion spline is actually the size of a Dana 60. The pinion gear and ring gear are standard D44 dimensions. A hybrid, if you will. Regular old Dana 44 gears can be installed, however a sleeve must be welded to the pinion shank of the smaller D44 to make it the appropriate size for the Viper's inner pinion bearing. A new outer bearing, seal and smaller spline yoke must all be sourced as well, resulting in more money for a much weaker rear end.

Beginning in '95-'96 Vipers began to receive larger 7/16" ring gear bolts instead of the smaller 3/8", all else being the same. A few companies have bolt kits with spacers for installing small bolt gear sets onto a large bolt case. If you install a large bolt gear set onto a small bolt case the case holes must be enlarged to accomodate the larger bolt. All gear sets will interchange from '92 to '08.

However, differentials between '92-'02 and '03-06 will not swap. The SRT diff is much wider, and will not fit in the Gen I/II housing. The '08-'09 GKN differential will swap into a '03-'06 SRT housing, but you must buy the axle stubs for the '08-'09, as there is a difference there.

I hope this brings everyone up to speed.

Oh, Re: the 3.54 vs 3.55, they are the same gear. It's a matter of rounding, as mentioned before.

Ok, I am going to have to challenge the info here. Monzsta is new here, info with grain of salt, but he is on the other board(I think). The Super Dana rear was put in all cars starting in 2000 NOT 95/96. all the cars from 1992-1999 had the standard Dana rear which came with the 3/8" ring gear bolts. The change to the 7/16" ring gear bolts came with other beefier parts in 2000 on the super Dana.

The rearend parts numbers are the same with the exception of the designation of "AB" (earlier 1992-1999 diff) compared to the Super Dana's "AC" (2000-2002).

The experts are of course Chuck Tator and Mark Jorg., so I refer to them to clarify my info. Maybe I'm wrong................................................

 

[99 R/T 10]

Just got the info on the Dana 707381-3X gear set.

-> 11/39 tooth count, 3/8 ring gear screw diameter.

Comments?

Made for the earlier rearend. Unless you want to drill it out(harden steel, no thanks ), you might want to sell it and get a superdana gear set.

 

[ViperTony]

Made for the earlier rearend. Unless you want to drill it out(harden steel, no thanks ), you might want to sell it and get a superdana gear set.

Mike, do you know what the Dana part number(s) is for the 3.55/54 SuperDana gear set for a 2000-2002 Viper?

 

[dave6666]

Taylor Race said they use 3/8 ARP bolts and have never had a failure.

They also said it uses the stock bearings, so the pinion shaft must be the bigger HD size.

 

[99 R/T 10]

I don't, sorry Tony. I would give Chuck Tator a call, he knows everything. And if he is fuzzy on a certain piece of info, he will track it down and get back with ya .

914-763-3136

 

[eucharistos]

all this is kinda scary,

prior to this thread i would have been ok just driving into taylor racing and saying change it...shouldn't they (as the experts) know?

 

[ViperTony]

I don't, sorry Tony. I would give Chuck Tator a call, he knows everything. And if he is fuzzy on a certain piece of info, he will track it down and get back with ya .

914-763-3136

Yeah...I got that number memorized now as I've been on the phone with him this morning about something else. I just didn't want to bother him yet again.

 

[99 R/T 10]

Taylor Race said they use 3/8 ARP bolts and have never had a failure.

I have never heard of any failures either and in the early diff, (really center section where it bolts to), it should be fine. Do you have a spare rearend you are using Dave? If so and it's an early one, it will work just fine. The main failures I have seen and experienced have been the spider gears and output shaft(right side tristed):

You must be registered for see images

 

[99 R/T 10]

I would have no problem with ANYTHING Taylor racing says. They are the experts. I was just clairfing when the danas and super danas were installed and the differences. Both rearends are good enough to put down major HP

 

[dave6666]

I have not purchased anything yet. Well, aside from a purdy red 2001 GTS a few years back. Just doing research.

So my rear end would be a 2001 assuming I take mine out and take it to Taylor Race. We are neighbors here in the DFW area.

 

[eucharistos]

I would have no problem with ANYTHING Taylor racing says. They are the experts. I was just clairfing when the danas and super danas were installed and the differences. Both rearends are good enough to put down major HP

thanks for the clarification, knew there was a good explanation as taylor seems to have a really good rep

 

[99 R/T 10]

I have not purchased anything yet. Well, aside from a purdy red 2001 GTS a few years back. Just doing research.

So my rear end would be a 2001 assuming I take mine out and take it to Taylor Race. We are neighbors here in the DFW area.

Yeah, they install the quaife and it takes some machine work to fit everything. Really, the ring gear bolts and a non-issue. Much more to break before the ring gear bolts are stressed.

If it was me, I would get a second diff. That way there is no down time and you get to keep the stock piece. Turbosam6 on the "other" board is selling one for $400 if you need one.

 

[dave6666]

You mean downtime like during the 4 months of summer it's too hot to drive your car in Teaxs?



Really though, not a big deal as they are just 60 miles from me. Throw it in the back of the Super Duty and go get it when they are done.

 

[99 R/T 10]

You mean downtime like during the 4 months of summer it's too hot to drive your car in Teaxs?



Really though, not a big deal as they are just 60 miles from me. Throw it in the back of the Super Duty and go get it when they are done.

Too hot?! Dude, are you turning into a girl? Must be something in the water.......................

 

[dave6666]

MORE INFO!!!

I sent this inquiry to Snake Oyl who sells 2 Dana sets - pre 2001 and 2001-02.

My email to them:

On your Dana 3.55 gear sets for the Gen 2 Viper, there is a kit up to 2000 and then a kit for the 2001 and 2002 cars.

What are the differences in these kits?

-> Is tooth count the same?
-> Is the pinion shaft size the same?
-> Is the ring gear diameter and count the same?

Their reply:

The 1992-2000 Viper do not have ABS, all models 2001+ have ABS. The ABS units require a different Pinion seal and collars for the ring gear bolts. Pinion and ring gear have the same dimensions and counts – all Dana 44 HD (not to be confused with the light-duty 44 used in Corvettes).

Thank You,

Kurtis Anderson
Marketing Manager
Snake-Oyl Products
div Collector's Choice, LTD.
608-849-9878

 

[Monzsta]

Ok, I am going to have to challenge the info here. Monzsta is new here, info with grain of salt, but he is on the other board(I think). The Super Dana rear was put in all cars starting in 2000 NOT 95/96. all the cars from 1992-1999 had the standard Dana rear which came with the 3/8" ring gear bolts. The change to the 7/16" ring gear bolts came with other beefier parts in 2000 on the super Dana.

Richmond lists '93-95 as a 1.626" pinion with 29 spline, making it a big pinion.
1993-1995 Dodge Viper Street Gear Ring And Pinion Set Fits Dana 44 3.75 Ratio 45-12 Teeth 8.537 in. Dia. Ring Gear 1.626 in. Dia. Pinion 29 Spline

The rearend parts numbers are the same with the exception of the designation of "AB" (earlier 1992-1999 diff) compared to the Super Dana's "AC" (2000-2002).

The experts are of course Chuck Tator and Mark Jorg., so I refer to them to clarify my info. Maybe I'm wrong................................................

My dates might be off a smidge regarding the 3/8-7/16 bolts as I've seen them in years they shouldn't be in, but I'm pretty confident as to the remainder of it. I am always open to correction.

 

[Monzsta]

MORE INFO!!!

I sent this inquiry to Snake Oyl who sells 2 Dana sets - pre 2001 and 2001-02.

My email to them:

On your Dana 3.55 gear sets for the Gen 2 Viper, there is a kit up to 2000 and then a kit for the 2001 and 2002 cars.

What are the differences in these kits?

-> Is tooth count the same?
-> Is the pinion shaft size the same?
-> Is the ring gear diameter and count the same?

Their reply:

The 1992-2000 Viper do not have ABS, all models 2001+ have ABS. The ABS units require a different Pinion seal and collars for the ring gear bolts. Pinion and ring gear have the same dimensions and counts – all Dana 44 HD (not to be confused with the light-duty 44 used in Corvettes).

Thank You,

Kurtis Anderson
Marketing Manager
Snake-Oyl Products
div Collector's Choice, LTD.
608-849-9878

The only practical difference is going to be the ring gear bolt size. 3/8 or 7/16. ABS and pinion seal design have nothing to do with the design of the ring and pinion. By "collars" they may be referring to the spacers I mentioned before used with 3/8" bolt ring gears and 7/16" differentials.