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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Fairlane514 on June 21, 2012, 10:21:00 am

Title: 700R4 shifts to OD at 43mph
Post by: Fairlane514 on June 21, 2012, 10:21:00 am

84 2WD C10 700R4.  I seems to shift fine throughout the gears, but shifts into overdrive around 43 mph. This seems too soon to me, so I'm curious if other members have the same situation. This under light acceleration driving through town. Sometimes I just place it in "D" while in town and then shift to OD when on the highway. The motor just seems to be "suffering" when its in OD at such a low speed.

I am considering the governor kit with the weights and springs, but maybe 43 mph is "normal" and I should leave well enough alone.

Title: Re: 700R4 shifts to OD at 43mph
Post by: zieg85 on June 21, 2012, 10:40:43 am

That speed sounds about right to me assuming you have a low 3's rear end gear.  My 85 went to about 56 before it shifted into OD but I had a 2.73 gear 

Title: Re: 700R4 shifts to OD at 43mph
Post by: Fairlane514 on June 21, 2012, 12:45:20 pm

Not sure on my gear ratio.......I will check

Title: Re: 700R4 shifts to OD at 43mph
Post by: bd on June 21, 2012, 01:26:11 pm

43 MPH is normal (a fuel mileage thing).  But, as you said, you could change it with governor recalibration.

Title: Re: 700R4 shifts to OD at 43mph
Post by: Fairlane514 on June 21, 2012, 03:55:50 pm

Thanks, I appreciate the responses.

Title: Re: 700R4 shifts to OD at 43mph
Post by: Elpresidente on June 21, 2012, 04:24:06 pm

Mine has 3.08's and also shifts at 43 MPH, I just keep it in OD even in town. gives me more of an excuse to open up all 4 barrels when I have to speed up, haha.