How Can I Freshen My 915 Transmission?
#1
Burning Brakes
Thread Starter
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I just changed the pedal bushings and put in new gear lube. The pedals are now butter-smooth and shifting's better, but still a bit notchy.
Now, I know that's the nature of the beast, but I can't help thinking there's still room for improvement. The car had new synchros 25K miles ago (72K on the odo now). The gears don't grind, but it's sometimes a bit difficult in first and second.
Would new shift bushings be advisable? Perhaps new springs? New cable? Again, I'm not experiencing problems, and I don't really want to go the short shifter route. I just want my stock 915 to be the best it can be.
Thanks!
Now, I know that's the nature of the beast, but I can't help thinking there's still room for improvement. The car had new synchros 25K miles ago (72K on the odo now). The gears don't grind, but it's sometimes a bit difficult in first and second.
Would new shift bushings be advisable? Perhaps new springs? New cable? Again, I'm not experiencing problems, and I don't really want to go the short shifter route. I just want my stock 915 to be the best it can be.
Thanks!
#2
Team Owner
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shift bushings are dirt cheap and are always adviseable . pretty straight forward to install also. There is the cup bushing at the botom of the shifter, the donught bushing in the housing and the coupler bushings at the back between the seats on the floor . May give you a chance to readjust your coupler too, may take some of the notchiness out.
#4
Burning Brakes
Thread Starter
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Thanks ice, new bushings can't hurt, that's for sure.
Troy, it's Redline 80W90. I know Swepco has a lot of fans, but right now I can't complain.
Troy, it's Redline 80W90. I know Swepco has a lot of fans, but right now I can't complain.
#5
Race Car
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It is real easy to do the shift linkage bushings and the weltmeister coupler bushings are cheap and should last a lifetime. Lube everything good with a nice silicon/teflon paste.
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#8
Burning Brakes
Thread Starter
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Weltmeister shifter, ball cup, and coupler bushings are more than twice the price of the Pelican bushing set...are they worth it? I'd rather spend the money now than replace them again soon.
Thanks!
Thanks!
#9
Team Owner
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i just put stock stuff in mine and it has been fine .. but no doubt weltmeister makes some good stuff. I think I spent a total of like 20.00 on my bushings ,..
#10
RL Technical Advisor
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Randy's advice about never using synthetic in a 915 is worth taking,....
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#11
Burning Brakes
Thread Starter
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Thanks for all the advice.
I'm learning as I go!
I'm learning as I go!
#12
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I though swepco was a big hype but to my surprise a big improvement after putting it in and I know you mentioned that you don't want the short shift kit.
I waited a year and now I installed mine, I didn't even know why I waited this long. The shifting was much improved and more precise. I went with the factory kit.
I waited a year and now I installed mine, I didn't even know why I waited this long. The shifting was much improved and more precise. I went with the factory kit.
#13
Team Owner
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I had my car for about 5 years before installing my stock SS. I would suggest learning how to shift a 915 before throwing in a SS. I found the throw shorter , that is all. it wont make a bad transmisiin shift any better. it is definitely more fun , but for me does not add any " precision" .
#14
I haddah Google dat
Rennlist Member
Rennlist Member
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The quickest way to sort out the shifting is to have someone who is very familiar w a 915 get in and shift it. I can tell right away if its' wrong or right. There are a lot of components that need to be sorted and checked.
I would not just buy new springs and a cable. I would drain out the Redline and put in Swepco 201. Also check the cable adjustment.
I would not just buy new springs and a cable. I would drain out the Redline and put in Swepco 201. Also check the cable adjustment.
#15
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Well the issue that you are having could be in the hubs for the operating sleeves. They will occasionally develop burrs on the sides of the hubs. This will make the shifting a bit more notchy. The other issue that you might be experiencing, is there are a couple of different synchros that can be put into the 915. Often people will put in two 2nd gear synchros for 1st and 2nd. This will make 1st gear a bit more difficult to shift into as the spring rate is a bit stronger. Lastly, your operating sleeve for 1st and 2nd may be in need of replacement. Many times rebuilders will inspect this part and not replace it if the teeth have not been damaged, however they will sometime wear internally and get what I call scuffed, where the material has been scuffed or scrubbed off by the synchro after years of use. It looks fine, but in reality it is no long in spec.
These are just a few things to consider, I hope that this might be at least somewhat helpful. Feel free to call me if you have more questions.
Warmest Regards,
Erik Johnson
GBox Sales Manager
(303) 440-8899 work
(303) 895-4828 cell
These are just a few things to consider, I hope that this might be at least somewhat helpful. Feel free to call me if you have more questions.
Warmest Regards,
Erik Johnson
GBox Sales Manager
(303) 440-8899 work
(303) 895-4828 cell