American Muscle Cars Australia
Tech Talk & Articles => Chryslers/Mopar => Topic started by: Pana BB Duster on May 06, 2011, 08:53:20 PM
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Had issues with the Dana / Chrysler 8.25" diff in the Duster. Purchased a Sure Grip Centre over a year ago and was given a later model Sure Grip which is slighty different...
Also purchased a set of 4.10:1 gears for the diff and all good to go to get put in but ran into a problem.
After a bit of research I did find out that there was a difference with Chrysler 8.25 housings from 60's to '76 and the '76 to '96 and then they went 29 spline as well..
First problem: Even with the carrier pushed all the way over there was still play in the gear and pinion backlash. Measure it with the existing 'open centre' carrier and there's a slight difference of about 7mm or so. What a pain in the ass... Diff Specialist is stumped as well as it all fits in perfectly..
Solution: Machine up a spacer to push the gear over...
Problem: Carrier has a centering groove so the spacer has to be grooved exactly to the centering groove as well..
Solution: Go and see the old man who's a 50 year veteran Fitter, Machinist, Toolmaker, Hydraulic's expert and everything else...
Outcome: Old Man Pana machined up a 7mm spacer which is unbelievable! The most accurate tolerances that I've seen. This will spin the diff specialist out as his solution was 'Go and Get a new Carrier'..
Another Problem: Due to the 7mm spacer, needed longer bolts as a lot of pressure going thru this part of the vehicle. No drama's, let's go and get some longer bolts..
And another problem: Range 40 places and I think it was going to be hard to purchase 10 x Left Hand Thread Bolts with Washer, 3/8 UNF, High Tensile. I was p#ssed!
Solution: Old Man Pana cracked it and said I'll mill them up on the CNC machine... So off goes Old Man Pana and mills up 12 x High Tensile, 3/8 UNF, Left Hand thread bolts with washer...
OLD MAN PANA has done it again. Check out a couple of the pics of the spacer and the bolts that he machined. Fricken sensational! :bow:
Sure Grip and gear went back to diff specialist today and the guys there spunout at the workmanship. Centre works a treat now and diff should be finished Monday and then back to Chris at SMS Performance to be finished off...
(http://i497.photobucket.com/albums/rr333/duster440/2011-05-05204448.jpg)
(http://i497.photobucket.com/albums/rr333/duster440/2011-05-05204107.jpg)
(http://i497.photobucket.com/albums/rr333/duster440/2011-05-05204252.jpg)
So if anyone want's some custom fabrication work done let me know.. I'm sure Old Man Pana will do mates rates...
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Very handy..:way:
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Old Man Pana is an absolute legend! You are a lucky man Young Man Pana....:lol:
:way:
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Hey Chris, Tell me about it.. He's a fricken genius with stuff like that... Saved me a fricken headache and time in going and ordering a new LSD... :thanks:
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is it in yet Pana? have you tested it's metal.........so to speak?