Ackevor
Member
- 107
- -1
- 16
- Location
- Fairview, PA
Local trans shop did a 700r4 swap a little over a year ago. Truck has maybe 1000 miles on it since. Over that past year I have been chasing down a vibration above 50 mph. Along the road I had the starter fail to engage and grind a couple times. Last week I was changing motor/trans mounts to poly and looked at starter/flexplate engagement after I got them installed.
Some pics and a link to a video below. One side of the flexplate had too much clearance between the starter bendix, the other didn't have enough causing a grinding as pictured. Shimming the starter to open the tight spot yields minimal engagement on the opposite side.
Also checking axial runout as best I can, I get almost .060" of front to back moment. Pics also show how one side of the flex plate has full bedix engagement, the other has less because of this.
My guess is this is the cause of my vibration. The teeth ring looks like it was not centered when it was welded, I can't imagine this being caused by anything normal driving 1000 miles would cause.
Thoughts?
Looks skewed
![20161127_144637.jpg 20161127_144637.jpg](https://www.steelsoldiers.com/data/attachments/448/448020-939f57d40de24a954a873ffd000de9b9.jpg)
Full engagement on one side (ground spot)
![20161127_144555.jpg 20161127_144555.jpg](https://www.steelsoldiers.com/data/attachments/448/448021-b9cba15c97cb15716102fddcd252d6b8.jpg)
![20161127_144535.jpg 20161127_144535.jpg](https://www.steelsoldiers.com/data/attachments/448/448028-af8fb4924ce2c3bcfb150af098334700.jpg)
Partial engagement opposite side of flex plate
![20161127_144307.jpg 20161127_144307.jpg](https://www.steelsoldiers.com/data/attachments/448/448022-517377b3455ebbc7fc5c62bde34fcac5.jpg)
These next two just show how much the teeth ring moves radially (to and from center) the indicator was zeroed on one and .060" movem on the other, understand I can't get the needle straight on because of clearance issues and I know the number is changing partially because of where it falls on the plate. But it at least shows the slight out of round by judging the position of the tip to the ring.
![20161127_143530.jpg 20161127_143530.jpg](https://www.steelsoldiers.com/data/attachments/448/448023-e7b1d529e9836385ab48b3d81ea167fa.jpg)
![20161127_143222.jpg 20161127_143222.jpg](https://www.steelsoldiers.com/data/attachments/448/448024-890d42f68ece946b7b8fa2e480e0f9c2.jpg)
Ohh and fuzzy pics of the grind area from bendix.![20161118_150517.jpg 20161118_150517.jpg](https://www.steelsoldiers.com/data/attachments/448/448026-d577e408a243af3302801b3849ed8d06.jpg)
![20161118_150229.jpg 20161118_150229.jpg](https://www.steelsoldiers.com/data/attachments/448/448027-4291e40481b92e058859e441bcd88ae1.jpg)
![20161127_144401.jpg 20161127_144401.jpg](https://www.steelsoldiers.com/data/attachments/448/448025-1b8884468a4b32a283dc29e4c3707c63.jpg)
Video link. .065" at start, then I go back to my zero at the end.
https://youtu.be/iTTvpf5nrXs
Some pics and a link to a video below. One side of the flexplate had too much clearance between the starter bendix, the other didn't have enough causing a grinding as pictured. Shimming the starter to open the tight spot yields minimal engagement on the opposite side.
Also checking axial runout as best I can, I get almost .060" of front to back moment. Pics also show how one side of the flex plate has full bedix engagement, the other has less because of this.
My guess is this is the cause of my vibration. The teeth ring looks like it was not centered when it was welded, I can't imagine this being caused by anything normal driving 1000 miles would cause.
Thoughts?
Looks skewed
![20161127_144637.jpg 20161127_144637.jpg](https://www.steelsoldiers.com/data/attachments/448/448020-939f57d40de24a954a873ffd000de9b9.jpg)
Full engagement on one side (ground spot)
![20161127_144555.jpg 20161127_144555.jpg](https://www.steelsoldiers.com/data/attachments/448/448021-b9cba15c97cb15716102fddcd252d6b8.jpg)
![20161127_144535.jpg 20161127_144535.jpg](https://www.steelsoldiers.com/data/attachments/448/448028-af8fb4924ce2c3bcfb150af098334700.jpg)
Partial engagement opposite side of flex plate
![20161127_144307.jpg 20161127_144307.jpg](https://www.steelsoldiers.com/data/attachments/448/448022-517377b3455ebbc7fc5c62bde34fcac5.jpg)
These next two just show how much the teeth ring moves radially (to and from center) the indicator was zeroed on one and .060" movem on the other, understand I can't get the needle straight on because of clearance issues and I know the number is changing partially because of where it falls on the plate. But it at least shows the slight out of round by judging the position of the tip to the ring.
![20161127_143530.jpg 20161127_143530.jpg](https://www.steelsoldiers.com/data/attachments/448/448023-e7b1d529e9836385ab48b3d81ea167fa.jpg)
![20161127_143222.jpg 20161127_143222.jpg](https://www.steelsoldiers.com/data/attachments/448/448024-890d42f68ece946b7b8fa2e480e0f9c2.jpg)
Ohh and fuzzy pics of the grind area from bendix.
![20161118_150517.jpg 20161118_150517.jpg](https://www.steelsoldiers.com/data/attachments/448/448026-d577e408a243af3302801b3849ed8d06.jpg)
![20161118_150229.jpg 20161118_150229.jpg](https://www.steelsoldiers.com/data/attachments/448/448027-4291e40481b92e058859e441bcd88ae1.jpg)
![20161127_144401.jpg 20161127_144401.jpg](https://www.steelsoldiers.com/data/attachments/448/448025-1b8884468a4b32a283dc29e4c3707c63.jpg)
Video link. .065" at start, then I go back to my zero at the end.
https://youtu.be/iTTvpf5nrXs
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