Transmission removal help!!!

[elk_hunter]

hi all,

 

Helping my dad take out his manual transmission and we have came to one problem. this is on a 92 gmc sierra, 4.8(i believe) manual truck.

 

We have removed the cross member, removed the engine to trans bolts(3 on each side). the clutch cover, the support beam on the front of the transmission, starter and clutch slave,drive shaft.

 

Blocked the engine up, Jacked up the tranny, and we can not get it to release from the engine. there is no other bolts we can see, we have tried to pull,push whatever and it wont come apart. the only thing i can see is the 2 guide pins on each side.

 

What are we missing?

 

thanks!!!!

[Wingnut]

When in doubt, a BFH should always help you out.

[citydriver]

hi all,

 

  Helping my dad take out his manual transmission and we have came to one problem.  this is on a 92 gmc sierra, 4.8(i believe) manual truck.

 

We have removed the cross member, removed the engine to trans bolts(3 on each side).  the clutch cover, the support beam on the front of the transmission, starter and clutch slave,drive shaft.

 

  Blocked the engine up, Jacked up the tranny, and we can not get it to release from the engine.  there is no other bolts we can see,  we have tried to pull,push whatever and it wont come apart.  the only thing i can see is the 2 guide pins on each side. 

 

What are we missing? 

 

thanks!!!!

 

<{POST_SNAPBACK}>

 

 

Try grabbing the tail shaft and moving it from side to side

[Rookie]

Are you trying to pull the trany and bell housing at once? If so i would try it seperate. There shouls be 4 5/8 inch bolts holding them together. Im assuming that you also disconnected the shift linkage. Also you may want to put it in gear and rotate the tail shaft it may be binding on the clutch splines.. Just my .02

[elk_hunter]

Thanks for the help so far guys.

 

We have moved that darn tail side to side, up and down, all over the freaking place, It acts as if it still bolted on, the entire engine moves with the tranny.

And there are no more bolts left but those guide pins.....

 

 

This is the first time at removing this, where would this bell housing be at, and where would the bolts be, the manual didn't mention this at all.

 

Also it's a manual, so the only shift linkage is the stick shift, which has been removed. unless again I missing somthing.

[harlan]

Bell housing is between trans and engine. Bolts at the top of the bell housing (attached to the engine) at the back of the intake are hard to see.

 

Are there support rods somewhere to be removed?

 

If all else fails, hook the clutch back up and press the pedal. If it moves, you got all the bolts. If not, something is holding it.

[elk_hunter]

does it matter which gear the tranny is in? Not metion in the book we have(haynes), but just thouhg i'd throw that out.

 

i have felt around the entire engine to bell housing, and i can't see of feel any other bolts hold this thing on. An i know for sure those guide pins can be hold this thing down too bad, the tranny was removed 2/3 years ago for another problem.

[elk_hunter]

If we do try to remove the tranny from the bell housing, and those 4 bolts holding them together, is there anything else to due, or is just remove those bolts and the tranny then will then just come apart from the bell housing? or is there more involved in it?

 

thanks

[harlan]

Sorry, you didn't say 2 or 4 Wheel Drive?

Also, I can check my GM service manuals when I get home....

 

On mine v8, there is a stud/nut/nut combo that screws into the block thru the bellhousing at the 11oclock position when looking underneath It holds the fuel lines. That "looks" like it is not thru, but it is. The nut has to be removed and the fuel lines move out of the way, then you unscrew the other nut which is part of a stud that is thru the bellhousing into the block. That is a PITA. Does yours have this?

[elk_hunter]

it's a 2wd and is a v6 if that helps.

 

dont think i remember being any fuel lines around the tranny/bell housing

[harlan]

The book says you have a NV4500 trans, which you should be able to remove without taking bellhousing from the motor. IT says:

Shift lever, boot, and insulator plate-basically the entire shifter assembly.

Trans oil (don't think thats the issue)

Propellor shaft

Transfer Case (n/a)

Parking brake cable and controls if used

Exhaust pipes as necessary

Electrical harness as necessary

Clutch slave cylinder and lay aside

Trans vent hose

Support with jack and remove crossmember

Trans to clutch housing bolts and washers as used (looks like 2 per side)

Don't let trans hang on clutch

Pull trans straight back on the clutch hub splines

 

Done, should drop on the ground. My books a 94 CK Service Manual from GMC, so should be the same

[99-2door]

The book says you have a NV4500 trans, which you should be able to remove without taking bellhousing from the motor.  IT says:

Shift lever, boot, and insulator plate-basically the entire shifter assembly.

Trans oil (don't think thats the issue)

Propellor shaft

Transfer Case (n/a)

Parking brake cable and controls if used

Exhaust pipes as necessary

Electrical harness as necessary

Clutch slave cylinder and lay aside

Trans vent hose

Support with jack and remove crossmember

Trans to clutch housing bolts and washers as used (looks like 2 per side)

Don't let trans hang on clutch

Pull trans straight back on the clutch hub splines

 

Done, should drop on the ground.  My books a 94 CK Service Manual from GMC, so should be the same

 

<{POST_SNAPBACK}>

 

 

 

 

His transmission is not an NV4500.

Not behind a 4.3L v6

The NV4500 was used in 3500s and the such. It has PTO outputs on the sides.

[citydriver]

The bell housing is part of the tranny on a '92,I dont remember the model#, but it should be a 5-speed tranny.....if this is the 1st time its been removed in 12-13 years...its probably oxidized to the guide pins and engine block.....IF YOU ARE ABSOLUTELY CERTAIN THAT ALL OF THE BOLTS ARE REMOVED from the bell housing-engine...you will need to pry it off of the pins....a carefully placed pry-bar and a helper pulling on the tailshaft from side to side/up and down (kinda like a cicular motion) and probably a hammer to tap the area around the guide pins to try and loosen the oxidation

GOOD LUCK, its gonna be a bear

[elk_hunter]

Thanks for all the suggestions . it's helping out alot.

 

Tonight I'm heading back over to my dads to working on this some more.

 

2 yrs ago the tranny was removed(dont know why), i knew usually they are a pia from the elements, but being that short removed i though it wouldn't matter....

guess i was wrong.