The axle size and ratio identification code is stamped on the right-side axle tube boss of the center section. Six cylinder AMC cars used a 7-9/16 ring gear and V-8 cars used an 8-7/8 inch ring gear. The letter codes for 1979 are as follows:
K = 2.53 V = 2.53 (Twin Grip) H = 2.73 U = 2.73 (Twin Grip) F = 3.08 T = 3.08 (Twin Grip) X = 2.56 (V-8) O = 2.87 (V-8 with Twin Grip)
Last Edit: May 22, 2006 6:13:55 GMT -5 by pacer304
When you say shot... how bad and whats wrong? the gearing should be 2:56 .... IF posi- 2:87 IT might be cheaper to fix,, than buy brand X and adapt... ( new wheel cyl, shoes, turn drums, brakes lines, fluid, etc..
I just got the car for free from a guy I work with. After getting it home, it sat for 4 years, I did a basic tune up and it fired right up. I checked all thr fluids, except the rear axle, and wouldn't you know it... it was dry. I took it for a spin around the block and the read passenger wheel locked up. I could back up and un lock it and drive forward again but it sounded like a blender. I'm guessing the pinion bearing spit it self into the diff. I'll probubly just change out the diff and gears and install new bearing and seals. Anyone know if these axles are similar to the Dana 35 in later Jeep wranglers? I have some parts on the shielf and wonder if they would fit... Thanks...
Last Edit: May 27, 2006 12:36:15 GMT -5 by akpacer
The Dana 20 is just that,, and well as the 35, so you'd have to stay with the 20 .. I'm fairly sure all the 20's are the same in the Pacers and the rest of the AMC V8 line ,,all used the 20s in the V8 cars and the big cars with the 6 cyl had 20's too, so just find ANY AMC V8 hog head and change out the carrier, and gears .
I guess for some reason I thought your 79 was a V8? If not the same thing applies, dana 35 or 7-9/16 r/p any AMC Spirit, or Gremlin, Concord , other Pacer carriers will work, just decide what gears:,,, from 2:37 2:56: 2:73: 308: 331.... I have complete Pacer axle assy drum to drum from a 258 auto 1978 . and I think I still have one from 78 232 3 speed.. $100 each, NO ship,,, in Louisivllle KY 40228
I finilly got around to taking the axle apart. The ring an pinion are shot. Whats the trick to getting the axle shafts out of this thing? Do I need to remove the hub nut and hub first? Looks like I need a puller for that...
When the axle won't come out easy,, install a spare tire or just a junk rim.. and lay down with a LARGE sledge hammer and ca-bong several times on the back side,,and on different sides,, that usually works for me. you can use a block of wood as not to damage the wheel too bad..
Spindle/axle nut stays on! remove 4 back-plate bolts, remove wheel cyl brake lines... emergency brake cables.. hit from back side with large object,, pull out far enough to let carrier fall out after unbolted. If you hire this job out they will want the whole rear end to set up the replaced carrier using the same gears.? whos doing ALL the work, setting up /shims on replacement carrier? OR just find another complete assy from donor Pacer?