Socnarftrucks Posted August 8, 2021 Share Posted August 8, 2021 Recently replaced the flywheel/pressure plate on my 1981 f100 with a 4.9L and a 4 speed SROD transmission. The clutch seems to work well except in reverse when it shudders violently and doesn’t go especially when trying to back up a very gentle driveway slope. Any help would be appreciated. Thanks. Link to comment Share on other sites More sharing options...
Gary Lewis Posted August 8, 2021 Share Posted August 8, 2021 How many miles do you have on it? In my experience it takes some time for a clutch to "burn in", and until it does it can be grabby. I don't recommend it, but I've put the park brake on and slipped the clutch a bit just to bed it in. Not a lot or you can cause problems, but a clutch does time time to match up with the flywheel. Link to comment Share on other sites More sharing options...
Socnarftrucks Posted August 8, 2021 Author Share Posted August 8, 2021 How many miles do you have on it? In my experience it takes some time for a clutch to "burn in", and until it does it can be grabby. I don't recommend it, but I've put the park brake on and slipped the clutch a bit just to bed it in. Not a lot or you can cause problems, but a clutch does time time to match up with the flywheel. The odometer says 136k but it’s hard to know since I bought it used. Would it make a difference between an 10” vs 11” clutch? Link to comment Share on other sites More sharing options...
Gary Lewis Posted August 8, 2021 Share Posted August 8, 2021 The odometer says 136k but it’s hard to know since I bought it used. Would it make a difference between an 10” vs 11” clutch? I meant how many miles on the new clutch. And yes, if you went from a 10" to an 11" clutch then that might be part of the issue. The part of the flywheel that hasn't been used before won't have the same texture to it and is likely to be grabby initially. Link to comment Share on other sites More sharing options...
Socnarftrucks Posted August 8, 2021 Author Share Posted August 8, 2021 I meant how many miles on the new clutch. And yes, if you went from a 10" to an 11" clutch then that might be part of the issue. The part of the flywheel that hasn't been used before won't have the same texture to it and is likely to be grabby initially. Much appreciated. So I’ll try applying the ebrake and let it slip for a second Link to comment Share on other sites More sharing options...
Socnarftrucks Posted August 8, 2021 Author Share Posted August 8, 2021 The odometer says 136k but it’s hard to know since I bought it used. Would it make a difference between an 10” vs 11” clutch? 100 miles on the new clutch, sorry Link to comment Share on other sites More sharing options...
Gary Lewis Posted August 8, 2021 Share Posted August 8, 2021 100 miles on the new clutch, sorry With only 100 miles on it the clutch, pressure plate, and flywheel haven't "mated" yet. I think a bit of slipping may help. But don't make it long. Link to comment Share on other sites More sharing options...
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