HELP - driveline question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Travis K · 12-31-2007, 11:36 PM

I have a 72 K-10 that I just swapped a different 350 into. While I was doing this, I also pulled the transmission and transfer case to give everything a good cleaning and to replace all of the fluid and filters. Now that everything is back together the truck will not move in any gear. I have tried every gear on the transmission(TH350), and every gear on the transfer case. I am getting nothing. The torque converter is bolted to the flywheel, and the driveshafts all turn. I also ensured that the parking brake was not stuck. What could be causing this?

68C15 · 01-01-2008, 02:53 AM

is it possible the T case shifter is out of adjustment? which case is it? NP203 or NP 205?
did you seperate the case from the trans? (missing coupler) is the converter full engaged into the pump? (I sure hope so, otherwise you will need a new pump now

)

Travis K · 01-01-2008, 11:21 AM

It is an NP205, and I don't think the shifter is out of adjustment. I did seperate it from the trans, but everything went back together the same way it came apart. How do you know if the converter is fully engaged into the pump? When I put the converter back on the transmission, it was fully seated, but when I bolted it to the flywheel, there was about 1/4" to 1/2" distance between the converter and the flywheel. Bolting it to the flywheel pulled it away from the transmission about that much. Are there any board members in the Bismarck, ND area that would be able to come over and help diagnose this with me? I have beer in the fridge, and heated garage.

PanelDeland · 01-01-2008, 12:57 PM

Careful about what you offer Travis.That's an invitation to have 30,000 gearheads show up and drink your beer and scratch their heads.Hope it's a big garage.

Painter D · 01-01-2008, 01:09 PM

suffecient fluid in everything?

Travis K · 01-01-2008, 01:17 PM

All fluids are topped off, and all filters have been replaced.

**88JRFAN** · 01-01-2008, 03:09 PM

If You Can't Fit Your Fingers In Between The Converter And Bell Housing, Then The Converter Is Fully Seated.WHAT DID IT HAVE IT FOR TRANNY BEFORE HAND?

Travis K · 01-01-2008, 03:20 PM

It was the same tranny that was in the truck. I just swapped the motor, and pulled the tranny and t-case to clean them up.

68C15 · 01-01-2008, 04:46 PM

put the transmission in park, jack up both rear wheels (use SUFFICIENT jack stands) and try to turn the rear drive shaft. it should not turn.

does the truck move if you put it in 4 high?

Travis K · 01-01-2008, 04:54 PM

The truck will not move in any gear, tranny or t-case.

Travis K · 01-02-2008, 01:58 PM

I can just barely get my fingers between the converter and the bell housing. Since the NP205 is pretty much bulletproof, can I assume that something is messed up in the tranny?

AO50 · 01-02-2008, 02:38 PM

Maybe you forgot to reconnect the tranny vacuum line?

68C15 · 01-02-2008, 06:05 PM

OK, let's get down to bare tacks here. do you have access to a pressure guage you can screw into a 1/8 pipe thread hole? depending on your exhaust system configuration it may need a 12" long hose. I am gearing up to guide you through a pressure test on the tranny.

slammed1 · 01-03-2008, 02:00 AM

I think the first test needs to be to place the truck in park and with one rear wheel off the ground and transfer case engaged see if the rear wheels will spin......if so the transfer case is not engaged correctly. If you cant spin the one rear wheel that is off the ground then we can suspect the transfer case is engaged,and you need to go to the transmission like 68C15 is suggesting for a pressure test. Also if the transfer case appears to be engaged,start checking the shifter on the tranny to see if when the truck is in neutral that the rear wheel off the ground will spin or not.......this will also tell you that your heading in the right direction.

The reason I say one wheel is that if the rear diff is an open unit both rear wheels will spin even if the transfer case is engaged and tranny in park,BUT if the rear is POSI you can raise both wheels because of the way they will both spin together.

12-31-2007, 11:36 PM	#1
Travis K Registered User Join Date: Mar 2007 Location: Bismarck, ND Posts: 81	HELP - driveline question I have a 72 K-10 that I just swapped a different 350 into. While I was doing this, I also pulled the transmission and transfer case to give everything a good cleaning and to replace all of the fluid and filters. Now that everything is back together the truck will not move in any gear. I have tried every gear on the transmission(TH350), and every gear on the transfer case. I am getting nothing. The torque converter is bolted to the flywheel, and the driveshafts all turn. I also ensured that the parking brake was not stuck. What could be causing this?

01-01-2008, 02:53 AM	#2
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	Re: HELP - driveline question is it possible the T case shifter is out of adjustment? which case is it? NP203 or NP 205? did you seperate the case from the trans? (missing coupler) is the converter full engaged into the pump? (I sure hope so, otherwise you will need a new pump now )

01-01-2008, 11:21 AM	#3
Travis K Registered User Join Date: Mar 2007 Location: Bismarck, ND Posts: 81	Re: HELP - driveline question It is an NP205, and I don't think the shifter is out of adjustment. I did seperate it from the trans, but everything went back together the same way it came apart. How do you know if the converter is fully engaged into the pump? When I put the converter back on the transmission, it was fully seated, but when I bolted it to the flywheel, there was about 1/4" to 1/2" distance between the converter and the flywheel. Bolting it to the flywheel pulled it away from the transmission about that much. Are there any board members in the Bismarck, ND area that would be able to come over and help diagnose this with me? I have beer in the fridge, and heated garage.

01-01-2008, 12:57 PM	#4
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: HELP - driveline question Careful about what you offer Travis.That's an invitation to have 30,000 gearheads show up and drink your beer and scratch their heads.Hope it's a big garage. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

01-01-2008, 01:09 PM	#5
Painter D Registered User Join Date: Jun 2007 Location: DFW (Forney) Posts: 1,529	Re: HELP - driveline question suffecient fluid in everything?

01-01-2008, 01:17 PM	#6
Travis K Registered User Join Date: Mar 2007 Location: Bismarck, ND Posts: 81	Re: HELP - driveline question All fluids are topped off, and all filters have been replaced.

01-01-2008, 03:09 PM	#7
88JRFAN LET'S GO RACIN' Join Date: Oct 2007 Location: SALINA,KS Posts: 1,212	Re: HELP - driveline question If You Can't Fit Your Fingers In Between The Converter And Bell Housing, Then The Converter Is Fully Seated.WHAT DID IT HAVE IT FOR TRANNY BEFORE HAND? __________________ Daren 04 Chevy Extend cab 2500HD 6.0 Liter 4x4 71 CHEVY 3/4 4X4 402 BB, th400/np205, dana44/eaton ho52 w/4:10-TOY Rip El Jay RIP BOBBO'S MOM Last edited by 88JRFAN; 01-01-2008 at 03:10 PM.

01-01-2008, 03:20 PM	#8
Travis K Registered User Join Date: Mar 2007 Location: Bismarck, ND Posts: 81	Re: HELP - driveline question It was the same tranny that was in the truck. I just swapped the motor, and pulled the tranny and t-case to clean them up.

01-01-2008, 04:46 PM	#9
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	Re: HELP - driveline question put the transmission in park, jack up both rear wheels (use SUFFICIENT jack stands) and try to turn the rear drive shaft. it should not turn. does the truck move if you put it in 4 high?

01-01-2008, 04:54 PM	#10
Travis K Registered User Join Date: Mar 2007 Location: Bismarck, ND Posts: 81	Re: HELP - driveline question The truck will not move in any gear, tranny or t-case.

01-02-2008, 01:58 PM	#11
Travis K Registered User Join Date: Mar 2007 Location: Bismarck, ND Posts: 81	Re: HELP - driveline question I can just barely get my fingers between the converter and the bell housing. Since the NP205 is pretty much bulletproof, can I assume that something is messed up in the tranny?

01-02-2008, 02:38 PM	#12
AO50 Registered User Join Date: Dec 2006 Location: Fresno, CA Posts: 37	Re: HELP - driveline question Maybe you forgot to reconnect the tranny vacuum line?

01-02-2008, 06:05 PM	#13
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	Re: HELP - driveline question OK, let's get down to bare tacks here. do you have access to a pressure guage you can screw into a 1/8 pipe thread hole? depending on your exhaust system configuration it may need a 12" long hose. I am gearing up to guide you through a pressure test on the tranny.

01-03-2008, 02:00 AM	#14
slammed1 1972 Chevrolet SWB Join Date: Jan 2008 Location: FT Smith AR Posts: 512	Re: HELP - driveline question I think the first test needs to be to place the truck in park and with one rear wheel off the ground and transfer case engaged see if the rear wheels will spin......if so the transfer case is not engaged correctly. If you cant spin the one rear wheel that is off the ground then we can suspect the transfer case is engaged,and you need to go to the transmission like 68C15 is suggesting for a pressure test. Also if the transfer case appears to be engaged,start checking the shifter on the tranny to see if when the truck is in neutral that the rear wheel off the ground will spin or not.......this will also tell you that your heading in the right direction. The reason I say one wheel is that if the rear diff is an open unit both rear wheels will spin even if the transfer case is engaged and tranny in park,BUT if the rear is POSI you can raise both wheels because of the way they will both spin together. __________________ My New thread with pics (not my build thread yet.) http://67-72chevytrucks.com/vboard/s...46#post2573646 1972 Chevrolet 1/2 ton short wide bed,68 frt clip Project. 1980 Camaro Inherited when father passed,68K Miles 2003 Ford Mach1 FUN as Hell!! 2002 Dodge Ram 5-8 slam Rolling BillBoard (Gone not forgot) 2004 Dodge Ram HEMI 10" lifted on 37's and 2wd.



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