I know that not alot of ppl own a 5 spd. LS6 but maybe the problem im encountering is associated with manual cars in general. Whats happening is that when i press the clutch pedal and put the shifter into 1st gear, there is a strong thump coming from the tranny area. Anyone have a clue to what can be causing this? all help is greatly appreciated.
LS6 5 speed tranny
- Thread starter m3mo15
- Start date
00_slow_5spd_ls
Well-Known LVC Member
catch the rev
gcwimmer
Dedicated LVC Member
FYI: LS6 is a trade mark of Toyota Lexus, LS V6 is used by Lincoln LS.
All Lincoln LS's are 5 speed.
Don't sweat it m3mo15, I knew what you were talking about. Unfortunately, I don't know what the problem could be. Is the clutch sloppy? How many miles are on it?
milehighmikey
Dedicated LVC Member
How far can you lift the clutch pedal off the floor before it starts slowing the engine down? If it starts grabbing right away, you may need to bleed your slave cylinder. As a clutch wears, the distance off the floor for the pedal to start to engage the engine to the transmission grows higher, but if you are catching pretty low, and lower than it had been, there may be air in the slave cylinder. If all of that appears to be normal, then it could be as simple as a cold transmission. Does this happen even when the engine and transmission are warm? Try holding the clutch down for a bit more time before going from neutral to first. Does this help? One other possibility is pilot bearing friction. If the pilot bearing is coupling engine revs into the transmission input shaft, then that shaft will tend to remain spinning at engine speed, despite waiting for the clutch to allow the shaft to stop turning on a non-moving car. This imparts rotational force into the gearbox and the thump that you hear could be the synchros stopping the spinning of the shaft.
Try this: hold car stopped, with the engine running, shift into second gear with brakes on and clutch in.
Move the shifter quickly into first gear from second. Did it thump? If it did not, then the clutch is allowing the transmission input shaft to spin. Having second gear selected while at rest ensures that the shaft is not moving. Moving the gear selector quickly ensures that the input shaft cannot suddenly speed up while your foot is on the clutch and you take it between second and first gear.
Personally, if I am idling in neutral and press in the clutch and select first gear, it will thump if I don't wait for the spinning of the transmission to end, after a 2 second pause. It is sort of harmless, but it does contribute to the end of the synchros just a hair bit sooner, but so does just about every shift while the car is being driven.
Try this: hold car stopped, with the engine running, shift into second gear with brakes on and clutch in.
Move the shifter quickly into first gear from second. Did it thump? If it did not, then the clutch is allowing the transmission input shaft to spin. Having second gear selected while at rest ensures that the shaft is not moving. Moving the gear selector quickly ensures that the input shaft cannot suddenly speed up while your foot is on the clutch and you take it between second and first gear.
Personally, if I am idling in neutral and press in the clutch and select first gear, it will thump if I don't wait for the spinning of the transmission to end, after a 2 second pause. It is sort of harmless, but it does contribute to the end of the synchros just a hair bit sooner, but so does just about every shift while the car is being driven.
LS_is_my_girlfriend
Active LVC Member
Well I had a similar problem with a ford ranger I had, each time I would move it out of first there was a loud clunk sound. My ranger had one of its universal joint bearings going out, and I found the problem just in time. When I got to the joint the bearing had lost all its needles and was just floating around in the cup.
Don't know if your having the same issue since the LS is rear wheel drive, or if it even has universal joints in the drive shaft. Any way thought I would add my 2 cents.
Don't know if your having the same issue since the LS is rear wheel drive, or if it even has universal joints in the drive shaft. Any way thought I would add my 2 cents.
97stscaddy
Dedicated LVC Member
Sounds like your clutch isn't disengaging completely. Could need to be bled, or it could need a whole new slave cylinder. Try bleeding first though.
What's that supposed to mean? Your ranger wasn't?
The LS does have U joints but they're not serviceable. If one goes bad you have to replace the whole drive shaft from what I understand.
What's that supposed to mean? Your ranger wasn't?
The LS does have U joints but they're not serviceable. If one goes bad you have to replace the whole drive shaft from what I understand.
LS_is_my_girlfriend
Active LVC Member
Oh, was just saying that it could apply because its rear real dive like my truck was, but have never seen the drive shaft on my LS (since its sitting 5" off the ground) and didn't know if the same problem even applies. Ha, don't know if I made it any clearer.
I would try bleeding your clutch as Caddy suggested. I am currently having my slave replaced along with other parts (as Caddy may already know, ha). If you do end up needed a new slave, check out http://www.newfordparts.com I am going to order my parts with them. I asked and they are all OEM parts, the local dealerships here in Austin are marked up about 40%.
I would try bleeding your clutch as Caddy suggested. I am currently having my slave replaced along with other parts (as Caddy may already know, ha). If you do end up needed a new slave, check out http://www.newfordparts.com I am going to order my parts with them. I asked and they are all OEM parts, the local dealerships here in Austin are marked up about 40%.