box transmission

I'm having problems re-installing the 5-speed transmission on my '81 FI X1/9. I have the rear A arms out and the car is on jack stands. The transmission will not mate to the engine block because the bump-out for the CV joints is hitting the rear frame cross-bar. I made a drift pin and placed it...

I started out yesterday planning on just changing my shift rod seal which arrived just a few days after I ordered it from Eurosport (UK). The job went quicker than I had planned. The most significant difficulty was making sure the boot was not damaged during removal. I put that boot on in...

Does anyone have an efficient procedure for removing and replacing the Trans selector shaft oil seal at the back of the trans? My trans was new old stock, but it was still 40 years old, the seal felt a little dry but I couldn't easily get it out so I left it, but now it seems to be leaking so...

Has anyone tried replacing the little "lip seal" (wiper seal) inside the top of the speedo drive unit? The unit I'm referring to is on the transmission: Mine has the metal version (upper one in the pic above). And the seal I'm referring to is located inside the housing, where the drive's...

I recall someone had a good description of the positions for the shift selector input (on the trans) to equate to each gear engaged. I'm talking about the shaft on the transmission that the lollipop connects to. When the transmission is out of the car, completely disconnected from everything...

This post was created to help new users and some old ones understand and adjust their shift linkage to eliminate shifting issues. Please note this will cover the most common problems which will solve most issues for most X owners but you may have problems beyond the scope of this post with the...

It appears the left side stub axle seal is leaking on my 5-speed. How does one replace the seal? Also, what would normally cause this seal to leak, I have never had one go bad and I have had way too many Xs.

As the title. On the gearbox side. Have losing the al-nut, but it seems like the cable is locked with something. I can move it upp and down a mm or so, but it feels like it's locked in place.

I'm struggling to undo the speedo cable from the transmission on my 1983 X1/9. I can't move it with a good size pair of slip joint pliers, despite multiple soakings with penetrating oil. I don't want to break it and have to replace the whole thing. Am I missing something? Does the hex-head...

How do you get the boot over the lip of the shifter input shaft seal? I bought a new boot from MWB, worked it over the end of the shifter input shaft, but have not been able to work it over the lip of the seal. I have been fighting it for about 6 hours off and on. I tried lubricating the seal...

Hi all I bought a NOS shifter to body boot that was in good condition. It was not dried out at all. I installed it on the car, and it probably ripped right away. My original was ripped in exactly the same way. I can't recall where I bought this one, might have been eBay. I figured this would...

In another thread the question of alternative transmissions which could be mounted to the OE SOHC engine came up. In hope of leaving that thread somewhat clean, I am moving it here (posts are screenshots):

This post is a copy and paste of the excellent work of Steve and other contributors. Reposted here to have it in multiple places on the the forum and be searchable using tags. I have had nothing to do with this, it is the excellent work of the noted authors. Karl No need to post to this...

Most of the time, I prefer to drop the engine and transmission together and fit them back on the floor. Now I removed my transmission without too many problems, but I'm having a hard time bolting it in place. I'm using a floor jack and I'm trying to get the stud to align with its hole. I got it...

In 2017 Maxmod posted about the possibility of using a LSD from a Fiat Punto GT in an X1/9 box. https://xwebforums.com/forum/index.php?threads/5-spd-lsd-possible-option.32528/ While some would like a stronger diff for motorsport use, not everyone wants or needs a LSD, a standard open diff would...

Ever since my full engine rebuild last year, reverse and first are hard to find. Essentially I need to be lucky or moving for my shifter to click into place. Reverse is much harder to find and takes me multiple tries or more force than I want to use. I know that fork is a known weak point. I...

Good morning, I have had an intermittent leak on the 85X for years. It looks like Redline MTL more than engine oil and is usually on the transmission side of the engine. After the last couple of energetic drives, I have found small puddles under the trans. Now I am trying to recall if the...

My differential is leaking and it seems like final drive shaft sealings need replacement. Is it possible to replace those without dismantling the gearbox? There is a top cover on one side (the leaking side) on the final drive unit. If I remove that, would it give me access to at least one of the...

When I bought my '86 Bertone a year ago I noticed a wet area on the drivers side of the final drive case. I asked the previous owner about it and he said he thought it was coming from a weepy drain plug. I thought it might be the axle seal above but the two are so close together it could be...

Guys, what is the correct method to adjust the clutch slave rod on a 1500? Having just been through the process on my 1300 after swapping the slave cylinder my 1500 has come out in sympathy and started leaking from the slave. The 1300 was easy to setup but the 1500 looks different and I can’t...