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Title: Troubleshooting O/D trans and rpm/s
Post by: terry_208 on 2026-10-03 23:58

My main concern is the o/d. Can someone please help me troubleshoot it. It does not engage the o/d unit. It goes into freewheeling but that's all.

I'm also trying to figure the rpm's at 50 mph running in direct 3rd gear. I am having trouble with the calculations. I know input to the 3rd member is 1:1, a 3.89:1 final drive, and an 89" circumference tire. A functioning o/d will reduce this number by 0.7.

TIA

Title: Re: Troubleshooting O/D trans and rpm/s
Post by: KULTULZ on 2026-10-04 03:28

https://www.oldcarmanualproject.com/manuals/trans/Borg-Warner%20Overdrive/pages/Overdrive_Page_01_jpg.htm

https://fifthaveinternetgarage.blogspot.com/2015/10/borg-warner-r-10-r-11-tech-tips.html

http://ford-mel-engine.com/viewtopic.php?t=1483

https://rpmcalculate.com/engine-rpm-calculator/

YOU HAVE A 1957 FORD WORKSHOP MANUAL?

57fordsforever.com

General Category => General Discussion => Topic started by: terry_208 on 2026-10-03 23:58