ok i have a 1990 K5 blazer that has a tranny that is slipping a little and also lost 4th gear but it comes back every now and then... the truck gets me around and seems like it will keep going but of course it doesnt like wide open throttle and honestly it just needs to be fixed or replaced... i had the fluid changed and the fliud filter changed and it didnt help!!! also this truck is not a daily driver by any means so is throwing a T350 or T400 a good option??? at the same time why in the hell did this somewhat strong tranny act up on me at just over 100,000 miles???
i have never had anything but good results and heard good things from these older GM trannys... of course this blazer could have been used to tow in its days and i bought it out of state so i dont know the history... anyways im looking for some opinions for myself and keep in mind if i had the money to just call GM and order a crate tranny i wouldnt be posting this on a forum so im on a somewhat low budget seeing this is just my fun vehicle and i use it for trail riding and camping!!! thanks, jake
__________________ 1968 CAMARO SS 388CI PNP DART PRO1's, VIC JR, SOLID ROLLER, HELL FIRE RINGS, 12 BOLT 373, EAGLE 4340 FORGED, MAGNAFLOW ET 7.41
1994 Z28 388CI VORTECH YSI & LS1 COMPUTER, BMR FULL SUSPENSION A ARMS AND K MEMBER, KONI SHOCKS, STRANGE 12 BOLT 433, T400 & TRANS BRAKE, 58mm, JET HOT 1 3/4s
2002 Z28 6 SPEED, HURST, KONI SHOCKS, LONGTUBES, ORY, MAGNAFLOW CATBACK, COLD AIR, 8.3@91MPH ON 245 STREET TIRES! sold
Somewhat strong trainy man there weak, yeah if its not a daily driver th350 or 400 is a good option but is it 4wd in that case you'll have to deal with new driveshafts. just try finding a wrecked one cheap with a th350 or400 that way everything should go smoothly an you still have other parts that can be used
__________________ 1993 Z28 LT1 T56/M29 1.6 pro-form RRs, Fastchips, 160 t-stat, B&M short shift, Jegs opti, msd coil pack, msd super conductors, TB bypass,airfoil, all emmisions crap gone weighing in at 3100lbs
2000 S10 4.3L/4l60E DD no mods unless it breaks, and homemade CAI
well i guess i didnt mean they are all that strong, i just dont hear of them going out all that much if they are taken care of is all... thanks for the reply, jake
__________________ 1968 CAMARO SS 388CI PNP DART PRO1's, VIC JR, SOLID ROLLER, HELL FIRE RINGS, 12 BOLT 373, EAGLE 4340 FORGED, MAGNAFLOW ET 7.41
1994 Z28 388CI VORTECH YSI & LS1 COMPUTER, BMR FULL SUSPENSION A ARMS AND K MEMBER, KONI SHOCKS, STRANGE 12 BOLT 433, T400 & TRANS BRAKE, 58mm, JET HOT 1 3/4s
2002 Z28 6 SPEED, HURST, KONI SHOCKS, LONGTUBES, ORY, MAGNAFLOW CATBACK, COLD AIR, 8.3@91MPH ON 245 STREET TIRES! sold
WTB 700-R4 1990 K5 blazer 
1993 Z28 LT1 T56/M29 1.6 pro-form RRs, Fastchips, 160 t-stat, B&M short shift, Jegs opti, msd coil pack, msd super conductors, TB bypass,airfoil, all emmisions crap gone weighing in at 3100lbs
