jimiheadstone

I have a 69 dart gt with the dreaded 7 1/4 rear.
Never worked on one of these before.

questions, does the pumpkin remove from the case i see it has a rear cover.
if not how would it be removed to put a new on in?
i'm running a 273 so i'm thinking of going to 3:23 from 2:72.

what's involved with this??

please i know the rear is not much to speak of but i don't want to change out the rear for a 273. if it was a 340 no question.

TVLynn

DON'T bother with the 7 1/4 go find an 8 3/4 rear as you will probably not find gears for the 7 1/4

jimiheadstone

I already found a couple of places that sell the gears up to 3.90
just need info on how to remove the case or gear set

moe7404

OOOOO YE the 7 1/4 is a great rear end. IF you like wallowing around on the floor like a wine-O

Coronet 500

Not easy, best to have manual and many specialty tools needed.

Removal of some brake parts, axle retainer plates then axles.
Mark caps for reassembly, pry out differential (if spreader not available), hold yoke and remove pinion nut (250 ft/lbs), push pinion into case for removal. Now it's apart you've done the easy part.
Measuring pinion depth for shims is the tough part where special tools are needed, press and tool to install bearing, shim small bearing for preload (inch pound torque wrench).
Install differential with new gear and side shim for backlash (dial indicator + stand), add additional shims for side bearing preload (case spreader or TLC and hammer)

Pinion depth, pinion preload, backlash and side bearing preload procedures may need to be done more than once checking each time to get them exact.

Buying an extra pinion bearing, honing it out to slip on and off, can be done and paint the gears for pattern check for pinion depth but still everything together then apart then back together again until you get it right.

jimiheadstone

thank you coronet 500 for that answer.
now i remember all that work for the 7 1/4 rear.
it is quite involved.
i had a feeling about that.

I'll just leave good enough alone a wallow with my 7.25

Coronet 500

You are very welcome.

I've heard some use one of the Ford 8.8" axles in A body cars.
With some minor welding it looks doable, and they're plentiful.

TVLynn

Mustang would work
Just weld on new perches !