The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 700R-4 Overdrive Downshifting

thirdstreettito · 03-05-2011, 11:52 PM

No offense, but you gasoline guys dont have helpful input, considering a gasser/700R4 acts COMPLETELY different from a 6.2/700R4.

Our Suburban(my sig) downshift's from OD to 3rd at 1/3-1/2 throttle on a 20* or steeper hill when under 75mph. What the original poster describes is PERFECTLY normal for a 6.2/700R4. I'm not sure what the guy did to be able to say you can tow in OD, I've searched and searched and never seen a way you can do it.

My advice is, DO NOT TOW IN OD. By towing in OD the trans downshifts and then upshifts too often, it is called "searching" because the trans is searching for the right gear. Hence why they always say to not tow with a 700R4 in OD. You can tow in OD if you have a lock-up kit. What the lockup kit does is, it alloys you to drive(or tow) in OD without the trans "searching". It will only downshift from OD to 3rd with full throttle, it will literally save you thousands in new transmissions.

Lock-up kit - http://www.summitracing.com/parts/TRG-700-LU

03-05-2011, 11:52 PM	#11
thirdstreettito Resident of Here Join Date: May 2008 Location: Wesley Chapel, FL, USA Posts: 7,716	Re: 700R-4 Overdrive Downshifting No offense, but you gasoline guys dont have helpful input, considering a gasser/700R4 acts COMPLETELY different from a 6.2/700R4. Our Suburban(my sig) downshift's from OD to 3rd at 1/3-1/2 throttle on a 20* or steeper hill when under 75mph. What the original poster describes is PERFECTLY normal for a 6.2/700R4. I'm not sure what the guy did to be able to say you can tow in OD, I've searched and searched and never seen a way you can do it. My advice is, DO NOT TOW IN OD. By towing in OD the trans downshifts and then upshifts too often, it is called "searching" because the trans is searching for the right gear. Hence why they always say to not tow with a 700R4 in OD. You can tow in OD if you have a lock-up kit. What the lockup kit does is, it alloys you to drive(or tow) in OD without the trans "searching". It will only downshift from OD to 3rd with full throttle, it will literally save you thousands in new transmissions. Lock-up kit - http://www.summitracing.com/parts/TRG-700-LU __________________ ~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck Last edited by thirdstreettito; 03-05-2011 at 11:53 PM.