Setting the Pinion in a Chrysler 8.25

[Seeker]

First of all I am noob so bare with me with my description. And I am super cheap and want to do this myself for cheap. I have friends who know enough to make sure I don't make big messes...

I have a chrysler 8.25 regeared to 4.56 with limited slip with a matching dana 30 from my rolled jeep. I want to swap them in but we noticed that there was play in the pinion yoke in and out and side to side. We had replaced the pinion yoke and broke the torque wrench and tightened the yoke by hand a few months earlier. We opened the pumpkin and saw some wear but it wasn't bad.

What is the easiest way for me to set the pinion? Is it possible with out a lot of extra tools?

Any body want to do it in SoCal?

Thanks. Excited to get these under my heep.

 

[VAhasnoWAVES]

set the pinion... as in angles?

degree shims or weld on new leaf perches.

 

[DeftwillP]

I'm pretty sure he means replacing the pinion bearings.

 

[cheapcherokee93]

i think he's referring to the pinion preload

 

[Seeker]

Sorry I am ignorant. I do mean the preload and anything else I need to fix the play so that I don't mess up the gears. Thanks!

 

[souske]

I would send Robert a pm, his prices are reasonable, and he is fairly close to you.
Not something to mess with without the right stuff, 8.25 has a crush sleeve

 

[GrimmJeeper]

yep crush sleeve, one time use. and by Robert souske means Robert from RWKHauSupply. his email is [email protected]

 

[Serious Offroad]

Pinion preload can only be set with the carrier removed.

If you've never set up a Ring and Pinion before, this is either a great time to learn (and invest in a lot of tools) or a job for someone that has experience doing this type of work.

 

[Seeker]

So I'm back again. I had a friend check out the preload and back lash and it looked good. The only problems we see is that when we turn the pinion (with no shafts) it has a little resistance (55in needed to turn) and then it goes at 19in just fine. Plus the PO notched the gear to get the shaft out. I didn't have any problems before and I drove it for a year and about 10k miles. should I be concerned or just swap the axles?

 

[Talyn]

Are checking the pinion turning torque with out the carrier installed?

BTW, Ratech makes a solid pinion spacer to replace the crush sleeve: http://www.summitracing.com/parts/RAT-4114/

 

[Serious Offroad]

The item you linked to is for a Ford axle, the OP has a Chrysler 8.25" axle.

Yes 55 in.lb is too high. The FSM calls for 10-20 inch pounds.

 

[Talyn]

The item you linked to is for a Ford axle, the OP has a Chrysler 8.25" axle.

It is listed wrong by Summit. http://ratechmfg.com/chryslerspbs.htm PN 4114

Yes 55 in.lb is too high. The FSM calls for 10-20 inch pounds.

From what I am reading 55 is the initial turning torque the FSM has no spec for this. The running turning torque is 19, which is correct. Sorry, but I don't know the correct terms to use. You measure the torque while the pinion is in motion, not when you start to turn it.

Preload spec also changes if you have used or new bearings:
old: 10-20 in lbs
new: 10-30 in lbs

Either way 19 is a decent number.

 

[Seeker]

The carrier is still in. My friend was just concerned that it has some resistance at the beginning...after it turns it rolls fine at 19.... Feel free to ask more clarification....I am noob. We are planning to swap tomorrow and I just want to be sure since my family rides in it....

Another

It is listed wrong by Summit. http://ratechmfg.com/chryslerspbs.htm PN 4114
From what I am reading 55 is the initial turning torque the FSM has no spec for this. The running turning torque is 19, which is correct. Sorry, but I don't know the correct terms to use. You measure the torque while the pinion is in motion, not when you start to turn it.

Preload spec also changes if you have used or new bearings:
old: 10-20 in lbs
new: 10-30 in lbs

Either way 19 is a decent number.

 

[Talyn]

Its hard to measure the pinion preload with the carrier still in place.

 

[praetorian]

So if the carrier is in place the preload is might be less due to the resistance the carrier is creating?

 

[Serious Offroad]

See post #8.