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03-07-2007, 03:01 AM #1
- Join Date
- Feb 2007
Question about first gear in auto tahoe sport
I have a '95 Tahoe Sport Auto transmission. Every weekend, my Tahoe is in the desert. The problem that i am facing starts when i have to engage the first gear to drive up some steep dunes. When the tahoe reaches the top speed for the first geat, it shifts to the second one. According to me, when it reaches the top speed for the first gear, it should not move to the second one just like in a manual tranny.
Your comments please.
03-07-2007, 07:23 AM #2
03-07-2007, 09:40 AM #3
I think GM put some overrides in the programming of the transmissions to keep them from over-revving the engine. It won't go down to low until a certain RPM is reached and will shift out of low when a certain RPM is reached. Not positive, but I think this is correct. If not, I'm sure someone will put me back in my place.Gary
99 K 1500 Suburban
78 Silverado Big 10 w/factory 454
00 S-10 Blazer
1976 Trans Am
1980 Honda CB900 Custom
03-08-2007, 07:14 AM #4
- Join Date
- Feb 2007
Yup, I mean 1 and not the D gear. Lemme exaplin. When i need to cross a steep sand dune, i need all the torque. As the tahoe starts to gain momentum in the first gear, it shifts to second which results in loss of momentum and torque. It starts losing speed 'cos of the reduction in speed and then shifts back to the first gear but the momentum is lost.
03-08-2007, 01:22 PM #5
I think Gary's right. There may be no way around it except to have the computer reprogrammed.
03-08-2007, 01:31 PM #6There is no way to happiness....happiness is the way.:yipi:
High Desert SoCal
93 K1500 burb (personal) 350 AT 3" Lift 250K+
02 Honda Civic LX
Looking for a 1990's Miata for an engine swap
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