93 sierra tranny problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gmc-shawn · 02-04-2009, 11:28 AM

ok, i have a 93 gmc sierra 4.3v6 4x4 5 speed.i was playing around in the snow a lil bit(in 2wd).i was in second gear kinda spinning around corners, not over revving, just enough to get the tires spinning.either way, the other day,in 2wd, i was on some snow, in second gear, i gave it gas cuz i was kinda getting stuck,and the tranny started to grind when the wheels would spin.it doesnt do this in 1st.just 2,3,4.never tried 5th.anyways, now when im driving at normal speeds, lets say 70kmh,if i give it to much gas to accelerate, it grinds, and kinda feels like the clutch is slipping.but like i said, it doesnt do it in 1st at all..BUT.if im at a dead stop, and i accelerate very quickly thru the gears, it doesnt grind at all..does this make any sense..what could it be?.i havent checked the fluid or anything, but if it was that, wouldnt it do it even at fast acceleration?..thanks guys

66truckin · 02-04-2009, 01:00 PM

sounds like the synchros going on it. Those transmissions are fairly weak and can't take a whole lot of abuse.

gmc-shawn · 02-04-2009, 06:21 PM

is that a fairly big job to do?how much you think it would cost to fix that if i did it myself?..i just bought the truck as a winter beater and was planning on selling it soon..thanks

metalgod · 02-04-2009, 07:03 PM

check your u-joints first before you get all excited about you trans being bad......make sure you check it in nuetral and chok the tire

gmc-shawn · 02-04-2009, 08:38 PM

yah, i checked them a couple months ago, and they all seemed tight.i will check them again to make sure.its just weird how it doesnt do it if i accelerate quickly thru the gears..someone told me it could be the yoke on the driveshaft that goes into the tranny..

Restrorob · 02-04-2009, 10:53 PM

Quote:

Originally Posted by 66truckin

sounds like the synchros going on it. .

Harder accelerations help hold the gears in mesh with the others.....

gmc-shawn · 02-05-2009, 07:34 AM

ok..so now comes the question, can that be replaced or fixed?..can i do it myself or have to take it to a shop?..and last, anyone know a ballpark estimate if i can do it myself?..thanks guys, much appreciated

02-04-2009, 11:28 AM	#1
gmc-shawn Registered User Join Date: Feb 2009 Location: canada Posts: 15	93 sierra tranny problem ok, i have a 93 gmc sierra 4.3v6 4x4 5 speed.i was playing around in the snow a lil bit(in 2wd).i was in second gear kinda spinning around corners, not over revving, just enough to get the tires spinning.either way, the other day,in 2wd, i was on some snow, in second gear, i gave it gas cuz i was kinda getting stuck,and the tranny started to grind when the wheels would spin.it doesnt do this in 1st.just 2,3,4.never tried 5th.anyways, now when im driving at normal speeds, lets say 70kmh,if i give it to much gas to accelerate, it grinds, and kinda feels like the clutch is slipping.but like i said, it doesnt do it in 1st at all..BUT.if im at a dead stop, and i accelerate very quickly thru the gears, it doesnt grind at all..does this make any sense..what could it be?.i havent checked the fluid or anything, but if it was that, wouldnt it do it even at fast acceleration?..thanks guys

02-04-2009, 01:00 PM	#2
66truckin Registered User Join Date: Jan 2009 Location: Springfield, IL Posts: 185	Re: 93 sierra tranny problem sounds like the synchros going on it. Those transmissions are fairly weak and can't take a whole lot of abuse.

02-04-2009, 06:21 PM	#3
gmc-shawn Registered User Join Date: Feb 2009 Location: canada Posts: 15	Re: 93 sierra tranny problem is that a fairly big job to do?how much you think it would cost to fix that if i did it myself?..i just bought the truck as a winter beater and was planning on selling it soon..thanks

02-04-2009, 07:03 PM	#4
metalgod 2-door hoe Join Date: Feb 2009 Location: doyelstown,Pa Posts: 67	Re: 93 sierra tranny problem check your u-joints first before you get all excited about you trans being bad......make sure you check it in nuetral and chok the tire

02-04-2009, 08:38 PM	#5
gmc-shawn Registered User Join Date: Feb 2009 Location: canada Posts: 15	Re: 93 sierra tranny problem yah, i checked them a couple months ago, and they all seemed tight.i will check them again to make sure.its just weird how it doesnt do it if i accelerate quickly thru the gears..someone told me it could be the yoke on the driveshaft that goes into the tranny..

02-05-2009, 07:34 AM	#7
gmc-shawn Registered User Join Date: Feb 2009 Location: canada Posts: 15	Re: 93 sierra tranny problem ok..so now comes the question, can that be replaced or fixed?..can i do it myself or have to take it to a shop?..and last, anyone know a ballpark estimate if i can do it myself?..thanks guys, much appreciated



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