Third member/ ring and pinion

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

Buffchief

SILVER Star
Joined
Aug 28, 2014
Threads
84
Messages
795
Location
East Texas
Anyone know where to get a drop in third member for the rear diff with 3.70 gears for 1980 fj40...OR...a complete rear axle for an 81/82 40? seems like everyone is out of the ring and pinion at that ratio that I've called. also thinking of going to a 5 speed trans with a newer split T-case...etc....
 
any diff, front or rear from late 1979 thru 1987 will work for you
the later diffs may need the flange swapped out
40 or 60 series, US spec, had 3.70 ratio

I think I've still got some but shipping is high these days
 
You may have to buy ring and pinion sets and have them dialed in.
 
55 and split TC. Will need a late rear axle if going with a 5 speed.

If you are just trying to solve a parking brake, I make a very nice complete kit to retrofit the later drum brakes to the early-1980 axle.

I also sell new H55f/transfer case combos, but with the 3.70 gears (that you should have in your 1980 already) and 33" tires you shouldn't really NEED a H55f 5th gear. Happy to help, we ship to Texas all the time.
 
If you are just trying to solve a parking brake, I make a very nice complete kit to retrofit the later drum brakes to the early-1980 axle.

I also sell new H55f/transfer case combos, but with the 3.70 gears (that you should have in your 1980 already) and 33" tires you shouldn't really NEED a H55f 5th gear. Happy to help, we ship to Texas all the time.
I'm not trying to solve a parking brake problem ....but, I was thinking of going to a 5-speed (seems like that's a thing to do now) and if so would need the late style rear axle with the emergency brake at each hub. I get up and cruise interstate easily at 65+- with my original set up now, but my rear diff is creating a loud (to me) roar and a decent amount of vibration that I don't think is normal when there is pressure (throttle) on them. I had that drive shaft balanced and I know they are good but I rebuilt the 3rd member but I just can't get it right backlash etc.... without the correct tools and know how. I checked with a couple of known companies for drop in rebuilt 3rd members and no one has them and are having a problem sourcing 3.70 ring and pinion is for a rebuild. My 40 is an early (April 1980) I just need a drop in solid rear third member that is set correctly so I can just....DROP it in and go.
I know going with a 5 speed was going to cause and cost a bunch of 🤑 especially since I have a OEM PTO winch and gear box.
 
Put a wanted ad in the classified section. Also in your clubhouse section too.
 
55 and split TC. Will need a late rear axle if going with a 5 speed.
I only used a FJ60 axle for the wider track and do not have parking brakes on the rear axle I have the brake still on the output of the TC.
 
I only used a FJ60 axle for the wider track and do not have parking brakes on the rear axle I have the brake still on the output of the TC.
I don't want a wider axle because of the amount that will stick out past the qtr panels on this one. I do have a 93 FZJ- 80 that I'm planning on moding with a 45 body and expect the extra width on it. That's another project in waiting. So many options for it all!
 
I'm not trying to solve a parking brake problem ....but, I was thinking of going to a 5-speed (seems like that's a thing to do now) and if so would need the late style rear axle with the emergency brake at each hub. I get up and cruise interstate easily at 65+- with my original set up now, but my rear diff is creating a loud (to me) roar and a decent amount of vibration that I don't think is normal when there is pressure (throttle) on them. I had that drive shaft balanced and I know they are good but I rebuilt the 3rd member but I just can't get it right backlash etc.... without the correct tools and know how. I checked with a couple of known companies for drop in rebuilt 3rd members and no one has them and are having a problem sourcing 3.70 ring and pinion is for a rebuild. My 40 is an early (April 1980) I just need a drop in solid rear third member that is set correctly so I can just....DROP it in and go.
I know going with a 5 speed was going to cause and cost a bunch of 🤑 especially since I have a OEM PTO winch and gear box.

I’ll try again.
My kit lets you install the later backing plates so you don’t have to source a rare 81-84 axle. We sell and install all these all the time. Here’s pic of one that got done at my shop a few weeks ago.

We also rebuild 3rd members and should have a good 3.70 core or two around, but it doesn’t sound like you checked with us. Maybe we aren’t reputable enough :)

ReactNativeBlobUtilTmp_pq9164wotlin7rwlx3ubgf.webp
 
I’m waiting to hear back from Sextonoffroad for a 3.7 ring and pinion that I ordered a few days ago. Hoping they aren’t drop shipping from Yukon, because I spoke with Yukon today and they said around mid September for their current back order.
 
Back
Top Bottom