alfetta

I hope someone in the RL community can help. I had installed a Wevo shift coupler and front bushings/cups in my 915. After about 200 miles it began to intermittently not want to disengage from fifth. Absolutely no movement from ****, like it was glued in, no play in the movement. I tried pushing the clutch in and out and giving some gas, but no movement. About 30-60 seconds after the freeze I could shift normally. Hot or cold or speed doesn't seem to affect it. The frequency of freezes is increasing to about once every 10 5-4 downshifts.

Do you it is a linkage adjustment or something in the gearbox that just happened to start going bad after the coupler was installed? The transmission was rebuilt about 6k miles ago. I want to take it either to my regular shop or to the speciality shop that installed the Wevo, not sure which.

Thanks!

Edward

Hey Jim,

Weird that it is intermittent like it is since the coupler is either adjusted properly to work in all shift planes, or it won't. I don't have a definitive answer except to absolutely check the easiest thing first: the coupler, of which there is a grand total of one bolt to make sure it's not slipping. Assuring this is tight and you can shift through all gears cleanly, check the shift assembly as there is a nylon bushing that the rod passes through, and a nylon "cup" that the shifter ball end fits into: either of these could be loose/worn or cracked. Did the shop replace these two bushings when you did the wevo coupling as this is an essential "while you're in there" job.

Edward

alfetta

Thanks Edward for the reply. Everything was replaced at the same time.

When it is in 5th and any other gear while driving there is some small normal play. But when it mysteriously freezes in 5th, there is abssolutely no play in the know, it is like it is glued in place. There is no pattern of when it decides to freeze and when it releases the hold on the shifter. I drove on the freeway and would check every minute or so and sometimes it was a normal bit of movement in the ****, and other times it was frozen. The only was to unfreeze it is just wait a minute or so.

Jim

Edward

Weird indeed! I’d take it to the shop that installed the coupler and have them do a full recheck of all bushings to make certain something isn’t loose or faulty. I’d definitely try and eliminate the entire shift mechanism before turning toward the trans.

Edward

alfetta

Edward, I was trying to decide if it was internal I would go to my regular shop. I'll take to the installer first, thanks, Jim

IPA1

Any chance its a engine / transmission mount moving and binding up the linkage?

alfetta

You could be right and I will test it tomorrow on the freeway. I can tell if it is locked by the lack of any movement of the gear lever. I can toss the around, brake and accellerate to see if it frees it up. Thanks for the idea, it makes sense. Jim

theiceman

i had this exact issue and a coupler adjustment fixed it.

alfetta

Thank you. I have watched some how-to videos on the adjustment. I am curious how you found the right adjustment. Just trial and error? I know to mark the shaft and coupler before I start fiddling with the adjustment, but other tips would be appreciated. Jim

theiceman

yeah there is a technique but for the most part its minor trial and error

If you google it you will find the procedure. Peter Zimmermann talked me through it many years ago. If you cant find a procedure here on rennlist , try Pelican.

Edward

Hey Jim,

Here's a vid that I used not too long ago when I put in my Stromski coupler, same principle as the wevo one. You likely have already seen this if you've hunted on the web. If not, you can fast forward to where the guy starts with the adjustment part, but ultimately it is trial and error. Make the mark before you loosen the bolt, but know that the mark won't get your back exactly as very small movements at the coupler translates to a significant difference in the linkage's ability to change gears. It's not hard, but just takes a bit of fiddling.

Edward

alfetta

Thanks Edward. I have not seen this video but will watch it. Sounds like a lot of fiddling to be sure. Jim

alfetta

Thanks to all for the tips. I followed some advice from the RL community. The installer said there was a lockout provision for the 5th-R gate but I'm so sure of that. But he made a rear coupler adjustment and all seems well. The Wevo is certainly worth it. The 915 is a fun gearbox!

Edward

That's outstanding, Jim! Glad it was an easy fix that required nothing more an adjustment! And yes, a properly sorted 915 is a beautiful thing!

Edward

theiceman

yup its a small metal Pall in the shift housing and rear coupler has to be adjusted for it, glad you got it sorted/.