tranny down shift problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jason Roberts · 01-05-2003, 10:39 AM

can anyone tell me what the wire connection on the side of my 350 turbo is it will not down shift untill I bring it under 25 mph.
where is it supposed to be hooked up?

low 84 · 01-05-2003, 03:45 PM

if the connection is on the dirver side of the tranny, then you probly have a lockup torque converter. what is does is above a certain speed it locks the engine and transmission up solid trough the torque converter. this gives you better gas milage on the highway becuase your input shaft on the tranmisson is turning exactly the same speed as the engine, with the converter not locked up the tranny does not get 100% of the power from the motor due to the inefficientcy of the torque converter.

with this being disconnected your transmission just won't lock up at higher speeds, which dosen't hurt anything, alot of th350's are like that from the factory. it shouldn't effect your downshifting either. i think your problem is somewhere else.

gchemist · 01-05-2003, 09:41 PM

Jason,
Is your downshift cable working properly? Is there any binding? Is it properly adjusted?

Jason Roberts · 01-06-2003, 07:17 PM

down shift is working fine. it will kick down when I push 3/4 down
just won,t gear down when I slow down until 25 mph.

01-05-2003, 10:39 AM	#1
Jason Roberts Registered User Join Date: Dec 2002 Location: Canada Posts: 18	tranny down shift problem can anyone tell me what the wire connection on the side of my 350 turbo is it will not down shift untill I bring it under 25 mph. where is it supposed to be hooked up?

01-05-2003, 03:45 PM	#2
low 84 Registered User Join Date: Jan 2002 Location: Houston, TX Posts: 2,144	if the connection is on the dirver side of the tranny, then you probly have a lockup torque converter. what is does is above a certain speed it locks the engine and transmission up solid trough the torque converter. this gives you better gas milage on the highway becuase your input shaft on the tranmisson is turning exactly the same speed as the engine, with the converter not locked up the tranny does not get 100% of the power from the motor due to the inefficientcy of the torque converter. with this being disconnected your transmission just won't lock up at higher speeds, which dosen't hurt anything, alot of th350's are like that from the factory. it shouldn't effect your downshifting either. i think your problem is somewhere else. __________________ '51 F100, backhalf with a narrowed 9 and coil overs, 18.5" mickeys, monte front clip, +400" sbc in the works '05 1500 Crew Cab RIP '84 swb 5/7 drop, solid cammed 408 w/ fully ported dart heads, th350 w/ 10 inch hughes, 12 bolt w/ 3.73 richmonds and a locker '80 swb 4x4 in progress: 7" lift, 350 th350/np205, d44 and 1.5" ORD tie rod, 14BFF w/discs , armored diff covers, 40" MTR's

01-05-2003, 09:41 PM	#3
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Jason, Is your downshift cable working properly? Is there any binding? Is it properly adjusted? __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

01-06-2003, 07:17 PM	#4
Jason Roberts Registered User Join Date: Dec 2002 Location: Canada Posts: 18	down shift is working fine. it will kick down when I push 3/4 down just won,t gear down when I slow down until 25 mph.



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