C 8.25 axle, vehicle options guide?

[AwesomeXj]

Hi, I have a 97 5spd. with a 29spline 8.25 with 3.07:1 gears. I'm looking to regear to either 4.10:1 or 4.56:1.

Does anyone know of a list of what Chrysler vehicles came with an 8.25 rear and which vehicle options came with tru-track LSDs and deeper gears?

I found a list for Ford 8.8 rears if I go that route but I'm curious if there is a list like this for the 8.25.

Thanks.

[4.3LXJ]

The late 4 Cyl XJs will have 4.10s. All I can say is I had a 67 Charger with a posi in it.

[AwesomeXj]

The late 4 Cyl XJs will have 4.10s. All I can say is I had a 67 Charger with a posi in it.

Did they make a 4cyl with an 8.25? Thought they all had d35s.

But did your charger have 3.73:1 or deeper gears from the factory?

[4.3LXJ]

Not sure on D35 only. Most of the time it is luck of the draw. Stock 3.55 gears in the charger

[prcjeep]

Did they make a 4cyl with an 8.25? Thought they all had d35s.



I have seen in the junk yard a 4cyl 98 AX15 XJ with a c8.25 in the rear. I wanted to pull the axles for the 4.10's but it was 2x4. Another limitation of finding the 8.25 is if the xj has ABS then it will be dana 35 from the factory in every case.

I swapped in axles from a 98 non-ABS just to get the 3.55 gears. This put my gearing pretty much back to stock having 33's on it.

[NW99XJ]

2003 JEEP LIBERTIES came with a disk brake 29 spline 8.25.... cant remember the exact width on them though....something in the back of my head tells me it MAY be more narrow....cant remember though.

Also.....'90-'00 Dakota, '72-'96 1/2-ton 2WD and 4WD Dodge Fullsize Pickups came with 8.25's.

First gen. 8.25's can be found on 1969 Plymouth Belvederes, Satellites and Dodge Coronets.

From 1973 on, the 8.25" rear end was used in many rear wheel drive car models produced by Chrysler through 1989.

Now if you were hunting for a "SURE GRIP" version.....
most of the Chrysler "M" Bodies came with either a 8.25, or a 8.75.....
Check the fender tag under the hood. If it has "A38" or "AHB" listed on the tag (depending on the year), that M-body was formerly a cop car .
Cop car M bodies almost always had Sure-Grip rears.
If the M-body is not a former cop car, it probably have an "open" type rear and not a Sure-Grip.
However this was a factory option on some models.
Pull the oil fill plug. If you can see springs inside the differential carrier, it's a Sure Grip...

Vehicles on this "M" platform include:

1977-1989 Dodge Diplomat
1977-1981 Chrysler LeBaron
1978-1981 Chrysler Town and Country station wagon
1978-1979 Dodge Coronet (South America)
1978-1982 Plymouth Caravelle (Canada)
1980-1981 Dodge Dart (Mexico)
1981-1982 Dodge Magnum 5.9L (Mexico)
1982-1989 Plymouth Gran Fury
1982 Chrysler New Yorker
1983 Chrysler New Yorker Fifth Avenue
1983-1989 Plymouth Caravelle Salon (Canada)
1984-1989 Chrysler Fifth Avenue

[Paddletrucker]

I swapped in axles from a 98 non-ABS just to get the 3.55 gears. This put my gearing pretty much back to stock having 33's on it.

Interesting. You're saying an XJ with 33" tires and 3.55's is about the same as 3.07's and stock tires?? Behind the 5speed of course. I know guys talk about 4.10's, 4.88's and 4.56's with the AW4, but I don't want this thing geared like a farm tractor. It's my daily ride. Axles with 3.55's ought to be easy to find.

I like the way it drives now, but sure don't want it geared any higher, and I'm sure that even with 31's, I'm not going to like the 3.07's.

And now, I'm giving serious consideration (since I am having to wait on the weather) to adding a coil spacer to the front and a shackle relocation hit and ironman Andy's adjustable rear shackles and going to 32'X11.50" tires

Oh dear Lord help me.






Sent from my iPhone using Tapatalk

[AwesomeXj]

I've decided to go with an 8.8 w/ LSD & factory 4.10 gears, then source a set of 4.10's from a 4cyl HP30.

I'll rebuild the Ford LSD and add 2 friction plates to make it a more aggressive LSD.

I'm also going to swap out my AX15 for a AW4 as I really don't like the 5spd off road. It's the whole aspect of clutch dancing on hills and rocks that turns me off of the AX15. So ill just run the auto and add a radesigns rail shifter.

[XJ Wheeler]

I've never heard of adding friction plates to do that. Wouldn't happen to have any literature on this, would ya?

[4.3LXJ]

I haven't done those, but that is an old trick I have done on others

[AwesomeXj]

Yeah that is a good trick, to elaborate you take the best two used friction discs from your old clutch pack, and re-order the discs friction-steel-friction-steel instead of the stock friction-steel-steel-friction arrangement. Then use the largest shim possible when you put everything back together (basically the largest one that will still allow you to get the spider gears back in).

You can also get an S-spring from an F150 which is a bit stiffer and will put more preload on the trac lock clutches.

[Mudderoy]

Interesting. You're saying an XJ with 33" tires and 3.55's is about the same as 3.07's and stock tires?? Behind the 5speed of course. I know guys talk about 4.10's, 4.88's and 4.56's with the AW4, but I don't want this thing geared like a farm tractor. It's my daily ride. Axles with 3.55's ought to be easy to find.

I like the way it drives now, but sure don't want it geared any higher, and I'm sure that even with 31's, I'm not going to like the 3.07's.

And now, I'm giving serious consideration (since I am having to wait on the weather) to adding a coil spacer to the front and a shackle relocation hit and ironman Andy's adjustable rear shackles and going to 32'X11.50" tires

Oh dear Lord help me.


Sent from my iPhone using Tapatalk

Numerically higher gear ratio for automatics is better. For standards you can get away with less. Also you have control over the shift points. My wife's TJ has 33" tires and 3.07 gears. You'd never notice it except on the freeway trying to maintain 65-70mph in 5th gear. 4th gear no problem.

If/when I re-gear the TJ I think I'll go with 3.55 gears but that's mainly because it's a fun drive on the street jeep and probably will never see off road. Otherwise I'd consider 4.10, and I may still after digging into the info more.

I personally have 4.56 in my 98. 4.10 would have been fine, but those 4.56 off road are wonderful.

[NW99XJ]

So whats the plan with friction modifiers?
None at all?
Just run synthetic?
Double up?

[AwesomeXj]

So whats the plan with friction modifiers?
None at all?
Just run synthetic?
Double up?

You mean like lube?
Probably just run Lucas 80/90HD limited slip oil.

Or are you referring to something else?

[NW99XJ]

Oh I didnt know there was a special oil with the friction agents already built in....I just know if the "ADDITIVES" that you add to the typical gear oil......

[XjJeepacorn]

The late 4 Cyl XJs will have 4.10s. All I can say is I had a 67 Charger with a posi in it.

Thanks that's good to know I wanna get a 4 banger for my dd, but they are hard to find. It would kick ass to get those and swap the gears :)

[bluedragon436]

I thought about converting my XJ to a 4cyl.... 4BT Cummins turbo diesel 4cyl... LOL... Either way I run 3.55's on my XJ with the AW4 and 33's... it isn't too bad really... but am thinking of hitting up some 4.10's ro even 4.56's as I am needing to replace my front pinion seal anyways.. maybe get a little bit of MPG out of it... can never hurt I guess... LOL