88 posi unit 10 bolt chunk swap

Reply Subscribe

Thread Tools

Search this Thread

03-01-2010, 09:29 PM

ZTime

Junior Member

Thread Starter

Join Date: May 2009

Posts: 19

Likes: 0

Received 0 Likes on 0 Posts

88 posi unit 10 bolt chunk swap

Can I put my 1988 Posi unit chunk into my 1985 iroc?

Reply Like

03-01-2010, 09:36 PM

whatever84

Member

Join Date: Oct 2009

Location: Ankeny Iowa

Posts: 374

Likes: 0

Received 1 Like on 1 Post

Car: 84 Camaro

Engine: 357

Transmission: TH350

Axle/Gears: 4.10's / Strange LSD

Re: 88 posi unit 10 bolt chunk swap

As far as I know yes as long as there both 10 bolts with the same number of splines. If the 88 has the 28 spline carrier you would also have to use it's axles. I'm sure someone will chime in who knows more about it then me.

Good luck!

Mark.

Reply Like

03-02-2010, 06:33 AM

JamesC

Moderator

iTrader: (5)

Join Date: Aug 1999

Location: Lawrence, KS

Posts: 19,282

Likes: 27

Received 94 Likes on 69 Posts

Car: Met. Silver 85 IROC/Sold

Engine: 350 HO Deluxe (350ci/330hp)

Transmission: T-5 (Non-WC)

Axle/Gears: Limited Slip 3.23's

Re: 88 posi unit 10 bolt chunk swap

The 28-spline axles didn't appear until 90, though a few may have crept in in late 89. The answer is yes, the 88 will swap to the 85. General info follows:

https://www.thirdgen.org/forums/tran...-10-bolts.html

JamesC

Reply Like

03-02-2010, 07:35 AM

big gear head

Supreme Member

Join Date: Sep 2008

Posts: 3,777

Likes: 0

Received 0 Likes on 0 Posts

Re: 88 posi unit 10 bolt chunk swap

Be sure that it is the right series for the gears that you are using. The 7.5 10 bolt uses a 2 series for the 3.08 to 2.41 gears and a 3 series for 3.23 to 4.10 gears. You can't use a 3 series with 2 series gears...
http://www.nastyz28.com/forum/showth...ht=change+posi
Read this.