Starter grinding
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New User
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Starter grinding
Hey fellas I have searched and searched and found several related threads but never what fixed the issue. I have a 86 F250 with the 351 HO and a C6 auto. When I bought the truck the flexplate was missing a few teeth. I replaced the flexplate and the starter with a new Delco Remy starter (part# 25402 for an auto trans) Everything back together and the truck will start but it sounds horrible while cranking like the starter is grinding. My starter is a 9 tooth and I did find reference to replacing the starter bendix with a 10 tooth ( part #SDN-241) I have done this to many 80s rangers and it worked like a charm but wanted to get y'alls advice before I did it.
Cargo Master
Joined: Jan 2019
Posts: 3,369
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From: Caraway, AR
I'll have to do some digging to see if I can find the post, but read one recently where(and I honestly can't remember the application) the bellhousing or backerplate caused an issue with the starter alignment. I believe the starter didn't sit perpendicular to the flexplate and the solution was to shim under the starter. I'll see if I can find that thread again.
*Edit*
So far the top issues are ring gear, misaligned starter, loose starter bolt, bad connection at battery losing voltage, and incorrect starter. Did you compare the new one to the old one? And was there anything wrong with the old one when you replaced it?
*Edit*
So far the top issues are ring gear, misaligned starter, loose starter bolt, bad connection at battery losing voltage, and incorrect starter. Did you compare the new one to the old one? And was there anything wrong with the old one when you replaced it?
FTE Legend
Joined: Nov 2015
Posts: 30,935
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From: Angier, NC
So the starters are different for different transmissions, stick & auto, I also believe the "backing plates" are different also.
Also on the starters how can you tell if it is for a stick or auto?
Just because they say it is for an auto it could be for a stick no?
Just my .02
Dave ----
Also on the starters how can you tell if it is for a stick or auto?
Just because they say it is for an auto it could be for a stick no?
Just my .02
Dave ----
More Turbo
Joined: Feb 2019
Posts: 563
Likes: 4
From: Wolfsburg
I can't say that I have heard anyone else have this problem, but the PO on my truck installed a starter that had a housing around the starter gear that was too long and slightly brushed the Converter. Horrible sound. I doubt that is the case here, as you put the starter in yourself, but it is a possibility. I would shine a light into the hole on the trans when you have the starter out to see if the converter makes contact.
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Don't really see how the starter can be misaligned as it is 2 bolts with no adjustment and it has been in and out several times with the same noise.
Bolts are tight.
Voltage drop on all cables check out good.
Starter is a good name brand (Delco Remy) and from all I can find the correct one for my application.
Thread Starter
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New User
Joined: Jan 2020
Posts: 3
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So the starters are different for different transmissions, stick & auto, I also believe the "backing plates" are different also.
Also on the starters how can you tell if it is for a stick or auto?
Just because they say it is for an auto it could be for a stick no?
Just my .02
Dave ----
Also on the starters how can you tell if it is for a stick or auto?
Just because they say it is for an auto it could be for a stick no?
Just my .02
Dave ----
Cargo Master
Joined: Jan 2019
Posts: 3,369
Likes: 16
From: Caraway, AR
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