Highway Trans. help
09-28-2017, 11:33 AM
#11
Moderator
Sorry I gave you a bad keyword. Shudder or shuddering will give you the results. Heres a few to read. There are many.
https://www.f150forum.com/f4/shuddering-45-mph-388758/
https://www.f150forum.com/f4/shudder...r-load-383244/
https://www.f150forum.com/f4/vibrati...-30mph-267494/
https://www.f150forum.com/f4/2004-f-...dering-391613/
https://www.f150forum.com/f4/shuddering-45-mph-388758/
https://www.f150forum.com/f4/shudder...r-load-383244/
https://www.f150forum.com/f4/vibrati...-30mph-267494/
https://www.f150forum.com/f4/2004-f-...dering-391613/
09-28-2017, 12:42 PM
#12
09-28-2017, 01:09 PM
#13
Senior Member
Agree with the others.
That's a classic F150 misfire. Not enough to set a code but enough to cause issues at low RPM and high load.
That's how I ended up with my 2007 F150 Lariat. The guy swore up and down he had a trans issue after only 1 year on the replacement. His "mechanic" friends confirmed it with him. No way it was a miss as he had done plugs just recently and had no codes. I bought the truck for $2500 after trying to help him out.
He had done the plugs alright, and not put any dielectric grease anywhere. #5 had a rusty spring inside the boot, likely from condensation from lack of dielectric grease. Changed all springs and boots, $30. No issues since.
That's a classic F150 misfire. Not enough to set a code but enough to cause issues at low RPM and high load.
That's how I ended up with my 2007 F150 Lariat. The guy swore up and down he had a trans issue after only 1 year on the replacement. His "mechanic" friends confirmed it with him. No way it was a miss as he had done plugs just recently and had no codes. I bought the truck for $2500 after trying to help him out.
He had done the plugs alright, and not put any dielectric grease anywhere. #5 had a rusty spring inside the boot, likely from condensation from lack of dielectric grease. Changed all springs and boots, $30. No issues since.