Diff ? - ZR-1 Net Registry Forums

8upZR1 · 10-25-2009

What kind of diff is in the 3rd member? I searched a little but couldnt find any info.

tomtom72 · 10-25-2009

In a C4 w/the zf 6 spd they used a D44, Dana 44 series, all the ZR-1's came with the D44.

Is that what you are asking? I don't remember the ring gear size, maybe 8" vs the older C4 rear D36 at 7" ring gear....I think I'm right on those stats.

Tom

Ccmano · 10-25-2009

3:45 ratio
H

Jagdpanzer · 10-25-2009

All ZR-1s came with the Dana Super 44 rearend and the Dana Spicer Trac Loc limited slip differential PN 74229X and 3.45 ratio gear sets. Some early European delivey Zs had 3.54 ratio gears. Standard OEM ring gears measure around 8 3/4" diameter. Mopar Viper ring gears (manufactured by Dana Spicer) measure almost 9.0".

http://www2.dana.com/pdf/5313-3.pdf

http://www.rsgear.com/catalogs/Diff/Dana_GM44_2.pdf

http://www.drivetrainspecialists.com...oduct-451.html

8upZR1 · 10-28-2009

Was actually wondering about the trac loc. Is there a locking diff that will fit the case? Also, I was looking at Jagdpanzer's last link to the trac loc. It mentions the highest numerical gear for that diff is 3.73:1. What needs to be changed for a 4.11:1 or something higher? Im thinking of doing the viper gearset but dont know $hit about it. Any problems with the size of that viper gearset? Anything else I should know?

Jagdpanzer · 10-30-2009

Quote:

Originally Posted by 8upZR1

What needs to be changed for a 4.11:1 or something higher? Im thinking of doing the viper gearset

Mopar Viper 4.10 gears will fit without any problems.

Jim Nolan · 11-01-2009

I would do some serious research first. I heard from a very reliable source that the 4:10 viper gears are now manufactured in China. If so I would question the quality.

8upZR1 · 11-08-2009

I was looking at either Mopar or Superior Axle for the gear set. What is the brand most people use for the swap? Any differences noted?

flyin ryan · 11-08-2009

Quote:

Originally Posted by 8upZR1

I was looking at either Mopar or Superior Axle for the gear set. What is the brand most people use for the swap? Any differences noted?

I put a Mopar set in my 90 & also in a buddy's 95 at the same time around May/June. They are quiet as a lamb...I must say. When I checked stock, was only....6 sets in the MI. warehouse at that time

. Something could have changed since then for sure. Was just going to do my diff., but when I told my buddy what was availible, at the time was the Mopar/Chysler crisis going on, he didn't want to take a chance & had me order a set for him too. They are thick on the Ring gear, for sure.

jonszr1 · 11-08-2009

is there a better set up than the trac loc for our rear ends ????

10-25-2009	#1
8upZR1 Join Date: Jun 2006 Location: Thunderbolt, Ga. Posts: 253	Diff ? What kind of diff is in the 3rd member? I searched a little but couldnt find any info.

10-25-2009	#2
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,609	Re: Diff ? In a C4 w/the zf 6 spd they used a D44, Dana 44 series, all the ZR-1's came with the D44. Is that what you are asking? I don't remember the ring gear size, maybe 8" vs the older C4 rear D36 at 7" ring gear....I think I'm right on those stats. Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

10-25-2009	#3
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,843	Re: Diff ? 3:45 ratio H

10-25-2009	#4
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,651	Re: Diff ? All ZR-1s came with the Dana Super 44 rearend and the Dana Spicer Trac Loc limited slip differential PN 74229X and 3.45 ratio gear sets. Some early European delivey Zs had 3.54 ratio gears. Standard OEM ring gears measure around 8 3/4" diameter. Mopar Viper ring gears (manufactured by Dana Spicer) measure almost 9.0". http://www2.dana.com/pdf/5313-3.pdf http://www.rsgear.com/catalogs/Diff/Dana_GM44_2.pdf http://www.drivetrainspecialists.com...oduct-451.html

10-28-2009	#5
8upZR1 Join Date: Jun 2006 Location: Thunderbolt, Ga. Posts: 253	Re: Diff ? Was actually wondering about the trac loc. Is there a locking diff that will fit the case? Also, I was looking at Jagdpanzer's last link to the trac loc. It mentions the highest numerical gear for that diff is 3.73:1. What needs to be changed for a 4.11:1 or something higher? Im thinking of doing the viper gearset but dont know $hit about it. Any problems with the size of that viper gearset? Anything else I should know?

11-01-2009	#7
Jim Nolan Join Date: Jan 2007 Location: Florida Posts: 240	Re: Diff ? I would do some serious research first. I heard from a very reliable source that the 4:10 viper gears are now manufactured in China. If so I would question the quality.

11-08-2009	#8
8upZR1 Join Date: Jun 2006 Location: Thunderbolt, Ga. Posts: 253	Re: Diff ? I was looking at either Mopar or Superior Axle for the gear set. What is the brand most people use for the swap? Any differences noted?

11-08-2009	#10
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,406	Re: Diff ? is there a better set up than the trac loc for our rear ends ????