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282 Posts
From 5/27:
So I haven't addressed my steering yet, and I'm pretty sure I need my rear gears checked out based on me likely screwing up the pinion flange swap on the IRS, but I got a good deal from a guy locally on his TW 170 heads, scorpion rockers, pushrods, etc. and I'm looking forward to cleaning them all up and doing the install later this summer. To go along with the heads I got a TFS1 cam, and it's all sitting on my bench until I can buy gaskets, bolts, etc to go along with it. I'm tired of doing things twice and won't be in a hurry on this, but I also don't have a lot more money to drop in it right now, or for the rest of the year I'm sure. I also picked up a MM strut tower brace that I'm sure I'll install when I do the head swap.
From 9/28:
When I installed the IRS in my coupe I had read online that I'd need to swap the pinion flange from the stick axle to the IRS so my driveshaft would work. Well, everything I read said just unbolt and then bolt up the other flange so that's what I did but in the process I ruined the old seal and it leaked. I also didn't record the torque reading first, then after replacing the seal I didn't get the pinion nut tight enough. Well, about 500 miles later the gear set and pinion bearing were trashed. It got to the point where I couldn't even drive it on the highway as anything over 45-50mph started causing a bad sound/vibration that got far worse with speed and the on/off throttle transition was unbearable.
Being an IRS rear it's a lot more expensive for shops to work on them and do a gear swap cause everything has to come apart to get at the gears. I decided since I didn't want to have to do it more than once, I went ahead and got the kit from LMR with new 3.55 gears, bearings, seals, fluid, etc. and removed the diff in my garage then took it to my buddy's shop where they fixed my mess.
While everything was out, I decided I better go ahead and do the control arm bushings as they were the only ones still rubber, but the worst ones to be rubber due to the wheel hop. Since I didn't have the $500+ for the delrin bushings I got the prothane IRS control arm bushings from LMR for like $80 and installed them. I also decided to get them because it's a street car and I have poly in the front control arms and like it, so it's good enough and a pretty easy install. I also installed my MM Strut tower brace that I had sitting on the bench.
I got the diff back from the shop Sunday and last night it was all put back together and running/driving. I haven't left the neighborhood yet as I needed to do a few other things like fix my headlight aiming, but it feels TONS better and drives great so far. I can finally use the car again I think.
Few pics:




So I haven't addressed my steering yet, and I'm pretty sure I need my rear gears checked out based on me likely screwing up the pinion flange swap on the IRS, but I got a good deal from a guy locally on his TW 170 heads, scorpion rockers, pushrods, etc. and I'm looking forward to cleaning them all up and doing the install later this summer. To go along with the heads I got a TFS1 cam, and it's all sitting on my bench until I can buy gaskets, bolts, etc to go along with it. I'm tired of doing things twice and won't be in a hurry on this, but I also don't have a lot more money to drop in it right now, or for the rest of the year I'm sure. I also picked up a MM strut tower brace that I'm sure I'll install when I do the head swap.
From 9/28:
When I installed the IRS in my coupe I had read online that I'd need to swap the pinion flange from the stick axle to the IRS so my driveshaft would work. Well, everything I read said just unbolt and then bolt up the other flange so that's what I did but in the process I ruined the old seal and it leaked. I also didn't record the torque reading first, then after replacing the seal I didn't get the pinion nut tight enough. Well, about 500 miles later the gear set and pinion bearing were trashed. It got to the point where I couldn't even drive it on the highway as anything over 45-50mph started causing a bad sound/vibration that got far worse with speed and the on/off throttle transition was unbearable.
Being an IRS rear it's a lot more expensive for shops to work on them and do a gear swap cause everything has to come apart to get at the gears. I decided since I didn't want to have to do it more than once, I went ahead and got the kit from LMR with new 3.55 gears, bearings, seals, fluid, etc. and removed the diff in my garage then took it to my buddy's shop where they fixed my mess.
While everything was out, I decided I better go ahead and do the control arm bushings as they were the only ones still rubber, but the worst ones to be rubber due to the wheel hop. Since I didn't have the $500+ for the delrin bushings I got the prothane IRS control arm bushings from LMR for like $80 and installed them. I also decided to get them because it's a street car and I have poly in the front control arms and like it, so it's good enough and a pretty easy install. I also installed my MM Strut tower brace that I had sitting on the bench.
I got the diff back from the shop Sunday and last night it was all put back together and running/driving. I haven't left the neighborhood yet as I needed to do a few other things like fix my headlight aiming, but it feels TONS better and drives great so far. I can finally use the car again I think.
Few pics:



