whats my gear ratio???

[redneckjames]

i did a straigth axle swap in the front and i know the front has 3.55 gears, but the rear is stock and theres no tag on it, is there another way to figure it out??

any help would be greatly appreciated

[rollguy]

i did a straigth axle swap in the front and i know the front has 3.55 gears, but the rear is stock and theres no tag on it, is there another way to figure it out??

any help would be greatly appreciated

Well, you can almost bet it is not 3.55.   However, you can check it by jacking up one wheel and placing a mark on the tire.  Place the trans in neutral (anything but park), and count the  number of rotations of the driveshaft to one complete turn of the wheel.  That will give you an approximation of the ratio.

[mudkicker715]

Or to be exact pull the axle cover and do the math

[redneckjames]

Or like I luckily learned there is an axle code on the pumpkin.. I checked itand learned it's a 3.54 so I'll let it ride ...

[Smitch]

I searched for those letter codes and couldn't find them. Do you still have them? I'll archive them in  the Eaglepedia if you do.

[Smitch]

Thanks. I just brought my TSM to my new residence today and never thought to look in it. Have an egg!

[rollguy]

Or like I luckily learned there is an axle code on the pumpkin.. I checked itand learned it's a 3.54 so I'll let it ride ...

Well, I guess I stand corrected.   3.55 & 3.54 are close enough.   I did not know they had that low of gear in the Eagles, except maybe in a 4 cyl car.

[Smitch]

Yes, the much sought after 4 cyl diffs.

[txjeeptx]

redneck- was the car originally a 4cyl car? if so, save that front axle you yanked outta there for other eagle owners who want to keep their IFS but want lower gearing, because the 4cyl front axle is the only housing with a differential case that will accept 3.55 or lower gears(numerically higher).

Also, if the rear axle is the stock Eagle D35, it is not much good for an off road rig. The Eagle rear axles have weak 2 piece shafts that can't hold up to big tires. You'd be doing yourself a favor to find at least a XJ Cherokee D35 with one piece shafts, although that axle is also still a weak D35. Pre-1990 XJ D35s are NON-C-clip, while anything after '90 has C-clip shafts, which are bad news when you break a shaft, since the wheel, brake drum, and remaining piece of shaft will slide out of the axle housing if you break a shaft. Keep yer eyes open for the elusive XJ D44 rear axle. The spring perches are in the right places for a bolt-in to an Eagle. You do have to cut and reposition the shock mounts on any XJ to Eagle axle swap.

[BenM]

Here's a table I put together last year with all the axle info I could find. The first three columns are the front axle codes, but the front usually came with a stamped tag. At the end is the difference in ratios, and it seems that the 2.72/2.73 was the greatest with .41%

I agree with offering the front axle to someone. I scrounged a 2.72 front so that I had one for future mods.

[redneckjames]

i was under the assumption that i had a AMC 20 in the rear but i new it was one or the other, and i know there weak i plan to go with an 8.8 rear out of a ranger with limited slip, or an open diff with a locker. Because i know the rear i have now is a p.o.s so i figure run it till it brakes!