Transmission Gear Slipping Problems of GMC Safari

1998 GMC Safari van automatic transmission model 700, failured at 93,000 miles due to a 3rd gear slippage. I found in my research to fix this problem this was common for GMC trucks with this transmission for this to fail between 90,000 and 100,000 even with scheduled service. GMC agreed to replace with a factory rebuild, which they did but at my cost of $2,300. 00, with a 36 month/50,000 mile warranty. I could not find any tech service bulletins or recalls on your web site, do you have anyother information. GMC and its dealership is already aware of my product displeasure when I expect quailty and durability it was not there. Please respond, thank you.

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97 Safari consistently sets p1870 code, transmission slips when warmed up. The vehicle shift extremely hard (actually slip)1st-2nd-3rd. Hard enough a significant chance of u-joint breakage, uncontrolled tire spinning on ice/slick roads, (I have experienced),whiplash type experience under moderate acceleration. This sudden shift also attributed to causing interior components such as center console to shake loose. Several instances have caused items in center column cup holder to fall out and spill. Gm has TSB on record and recognizes this affects 96-02 gm vehicles with the 4l60e trans(vans, SUV's, rear wheel drive cars and front wheel drive cars with similar transmission). Gm recognizes in their TSB of an ineffective valve body and that this is a "possible" problem and goes on to state it was corrected in late '02 mfg vehicles and there are no "recalls". It provides exact information regarding the above problem (TSB says "customer complaint") gm dealers are charging customers "outrageous" figures for trans replace only for the customer to have the same problem as soon as 10k miles as the new trans is still the "old" model with the defective valve body. Gm further acknowledges that a replacement trans is not necessary(unless "proven" failure) gm further acknowledges the code p1870 in a gm stc class (#17040. 01), how to determine the fault even though a simple TSB exists for this. Several TSB's as reference (there are more)#01-07-30-012,020 #99-07-30-005 #77-71-75 #02-07-30-001,030,042. Simply searching the web for p1870 will result in confirmation of said complaint.

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Transmission was slipping in 1st gear and clunking when shifting. After unsuccessfully attempting to rebuild the transmission, GMC told dealer to install a new transmission.

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Vehicle experience problems with power steering pump leaking/gas pedal sticking/gas indicator always reading full tank of gas/engine light coming on and off, and transmission slipping which may cause a crash. Please provide further information.

Transmission was replaced, failed again twelve hours after we got it back! then all was fine until 4-17-99 when the transmission slipped again. Dealership is currently looking into fixing it again.

While driving on highway transmission will slip between first to second gear. Sometimes when this happens engine check light will come on. Please provide any further information.