I put my blazer in 4lo it hit rev limiter and never shifted. I looked at tranny data on my scanner it says 4lo signal disabled. I landed a 4lo input from obs harness to the ls pcm. Tune problem?
I put my blazer in 4lo it hit rev limiter and never shifted. I looked at tranny data on my scanner it says 4lo signal disabled. I landed a 4lo input from obs harness to the ls pcm. Tune problem?
Red 94 GMC Sonoma
Red 94 Jeep Wrangler
Red 02 RCSB Silverado
Red 03 Ford Cobra
Red 04 CC Silverado
Red 05 Yamaha Raptor
I really like red
Not supposed to shift in 4-lo
2013 CC 5.3
81 C10 LS1 project
That would defeat the whole purpose of a transmission. It will and can shift it's in the tune.Originally Posted by tanz45
Red 94 GMC Sonoma
Red 94 Jeep Wrangler
Red 02 RCSB Silverado
Red 03 Ford Cobra
Red 04 CC Silverado
Red 05 Yamaha Raptor
I really like red
I understand that you can tune it to. Factory they do not. That's the answer to his question.
Reason being that if you are using 4 lo, you are creeping. If not creeping then use 4 hi.
2013 CC 5.3
81 C10 LS1 project
Really? Please quit. You've obviously never used 4-lo, or at least payed any attention. I can barely hit 5mph in 4-lo and 1st, that would be preety useless.
88 RCLB: LS swap in progress
00 CCLB
03 Yukon Denali: Wife's "soccer mom mobile"
Tanz, sorry man, but there has never been and never will be a factory auto trans, 4lo equipped vehicle that doesn't shift thru all forward gears while in 4lo.
Sounds like a calibration issue to me as well.
Meh, wrong if I'm wrong. I will still sleep tonight.
Maybe i too had a bad ground from on the position switch.
2013 CC 5.3
81 C10 LS1 project
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