rear diff question
 

I have a 92 truck. It's a 22re 5 speed and 4wd. I bought a complete rear end out an 88 truck. It too was a 5 speed 4wd truck. The rear diff in the 88 was welded. Now this weekend im going 4wheeling and wanted to swap diffs and put the welded diff in my truck. Now my question is, would I be okay to put that welded rear diff in my truck and drive to the place im going wheeling. It's about 10 miles from my house and its all back road.

Same gear ratios?

I wouldn't drive a welded rear that far but that's me.

:wabbit2:

I'm not sure. As far as I know the gears in my truck are stock. Is there an easy way to tell if the diff in my truck are the same as the gears in the welded diff?

Read the forum section Sticky.

:wabbit2:

Sticky?

The forum being 86-95 Trucks & 4Runners, and the sticky being labeled as a consolidation of such. Easily found at the top of the list of threads in said forum.

To help answer your question, there could be a number stamped on the edge of the ring gear telling you how many teeth it has. Such as 39, 41, or 43. That number can be used as a dividend which can be divided by the number of pinion gear teeth, the divisor, to get the quotient. You should be able to carefully count the number of teeth on the pinion gear(and the ring gear if necessary). Then do the math. The number you get, as the quotient, will be the gear ratio to the number 1.

For example: 41 ring gear teeth divided by 10 pinion gear teeth = 4.10:1

You might also be able to tell the gear ratio just by the color of paint on the pinion end, where the nut is. Here's a link to the color deciphering chart, which also has more information to help you figure out the gear ratio if the paint is no longer visible. http://www.4crawler.com/4x4/4R_TechI...#Differentials

Also you can find out what the stock gear ratio would be for your truck by checking the axle code. See this link for info on that: http://www.4x4wire.com/toyota/faq/vin/

Next time you have a question that's such a common one, do read through the sticky first. Then start a new thread only if needed.

That's actually a big help!! Thanks!!

The gearing is the same. The welded diff is a 4:10 and the one in my truck now is a 4:10

You can drive it. I have a spool in the rear and drive on the street everyday. I run 40 psi in the rear tires to help when turning.

The only concern I would have would be how good a job of welding it is.

In my 85 I had a welded rear end. But I arc welded it myself to be sure it was done right. But I drove it 200 miles on a camping trip loaded with gear and it drove great. My 69 FJ40 is welded as well.

Just keep in mind in corners and on uneven pavement and wet surfaces that the rear is locked up, so no Steve McQueen stuff...

I personally didn't weld it, so I'm not 100% sure. But it would appear to be a good welding job. it came out of a buddies trail truck. I'll be sure to air up the rear tires before I leave. Then I'll air down some when I get to the trails and air back up when I leave.

My buddy daily drives and wheels the piss out of his 86 4Runner with a welded rear. He has been doing this for over a year now. Tires hardly wear faster and for 95% of driving you wouldnt even know its there.

You will be fine

Awesome! That's what I wanted to hear. I'm only gonna do it for a day. Were supposed to be getting a decent amount of rain this weekend and I don't wanna take a chance of getting stuck at the place I'm going wheeling. But if I do there are a lot of people that can help out.