Stretch2126
Well-Known Member
Looks like the trans will start making noises in neutral. Goes away when the clutch pedal is pressed. It still drives great but the noise seems like it’s becoming more consistent. Anybody else have this happen?
F35 input shaft noise
- Thread starter Stretch2126
- Start date
I was going to guess throwout bearing, but they're typically noisy with the clutch pressed in, quiet when released. I see from your build log that you recently replaced your clutch/flywheel - any chance one or more of the pressure plate bolts is loosening? Any excessive vibration in neutral while revving engine?
Desert Sasqwatch
Goblin Guru
Seems there is lots of discussion about the F35 making rattling noises in neutral.
I know this is also true for the F40 as well.
I know this is also true for the F40 as well.
Stretch2126
Well-Known Member
I suppose it could be the clutch but DS’s video is almost exactly like mine it seems like. I can clutch in and out sometimes and it’ll go away but it comes back. I would hope the clutch isn’t already backing off after only having it on for a couple months. I’m putting some fresher oil in the case to see if it does anything. Not metal in the gear oil.
FWIW - The guy who posted the video replied to some comments that it was the "Incorrect preload on final drive bearings"
Stretch2126
Well-Known Member
Yeah I saw a couple other videos saying input shafts giving out or another internal matter. It might be time for an f23.
I'm certainly no transmission expert, but I've read that the GM transmissions are usually numerically designated in newton metres, so the F35 is rated at 350 Nm, the F23, at 230 Nm, F40 at 400 Nm and so on. Seems like the F23 would be a step backward if you're overpowering your F35?
Ross
Goblin Guru
The F23 is a step backwards according to GM, but the people who push these engines hard swear by the F23.
They say it shifts better, is cheaper, and is much easier to find in the auto recycler yards too.
Justing Reed runs 600+ hp thru his F23, so that seems pretty solid.
Also, the goblin weighs half the Cobalt, so that cuts the load down on the transmission.
They say it shifts better, is cheaper, and is much easier to find in the auto recycler yards too.
Justing Reed runs 600+ hp thru his F23, so that seems pretty solid.
Also, the goblin weighs half the Cobalt, so that cuts the load down on the transmission.
Desert Sasqwatch
Goblin Guru
This whole post thread has lots of good information about the F23, installing a LSD, and real world experience with it in some higher HP builds.
dfkitcar.com
[GUIDE] F35 to F23 (with LSD) Transmission Swap
I'm at a good point where I believe this can be documented. I'm still trying to figure out how to get the Speedometer to work, so if any you guys have thoughts around this please share! FIXED! First, why would someone do this? Well, first is performance. Going from the F35 with Final Drive of...