Killed the tranny - The 1947 - Present Chevrolet & GMC Truck Message Board Network

AJs72K5 · 07-27-2008, 10:39 PM

I think I killed the tranny in the K5 today. I knew I was gonna replace the TH350 with an overdrive at some point, but didn't expect to have to do it this soon. I was running the truck up and down the street in front of the shop. Truck was pulling hard around 4500 RPM in 2nd, it hesitated, then no more go. Coasted to a stop (the engine still runs fine). It has no forward gears 1st, 2nd, or 3rd, or reverse. Dropped the truck into 4LO, and nothing there either. I checked the fluid and it still looks clean...dipstick just say a pint low. This sucks.

BLUE THUNDER · 07-28-2008, 12:44 AM

Dude that sucks. Keep us posted on what it is. I want to put a meet and greet together in August or early Sept. Hopefully we'll both be up and running. I'm just about to get my motor started and broken in. Hopefully my tranny works. I have no idea if it even works. You gotta come by and check it out. Gimme a shout if you need a hand. Later, Mario.

Critter · 07-28-2008, 11:20 AM

Sorry to hear that, at least now you have an "excuse" to make the 700R4upgrade. Is the tranny making any grinding noise or anything when you shift it into a gear or is it basically silent?

AJs72K5 · 07-28-2008, 12:15 PM

Sounds like something is whining / spinning. But no grinding when shifting thru the gears with throttle. Best case, I'm thinking I blew up the torque converter.

67Steven · 07-28-2008, 02:01 PM

My guess would be the torque converter. The oil would be brown and smell 'burnt' if you had valves or something else go south in the guts (from personal experience)

70rs/ss · 07-28-2008, 02:26 PM

Pump maybe wit the whine, at any rate it'll need to be gone through or it is the perfect time for a 700r4!

AJs72K5 · 07-28-2008, 03:21 PM

I checked the dipstick with the truck off and it was about 2" up the dipstick. I then started the truck and the level on the dipstick dropped. So, fluid is at least moving somewhere.

jaros44sr · 07-28-2008, 04:58 PM

That sucks, now ya have to withdraw from TOTM

Hope it's something cheap, but trany's are never cheap

Jtrux · 07-28-2008, 05:08 PM

Nv4500!!

72truckman · 07-29-2008, 02:45 AM

JTRUX has the right idea!!!

vtblazer · 07-29-2008, 08:08 AM

Quote:

Originally Posted by Jtrux

Nv4500!!

Your already running an auto, stay with an auto.

As usual the distance kills but I have a good running th-350 sittin' here with your name on it.

If you do go 700r, there's several 'small' things to do to one if you want it to survive, once those are done, it's a damn good tranny IMO.

Have an extra one of those too...

**Matt's k5** · 07-29-2008, 12:36 PM

do you have a 205 t case?, check the coupler sleeve in the adater between the t case and tranny the grooved teeth had almost worn out and stripped clean out i first noticed this when shifting from drive to reverse a very load clunk i replaced mine from gm worked great then my trans when out after that i had no forward gears but i had reverse, just a thought to check

Jtrux · 07-29-2008, 05:47 PM

Quote:

Originally Posted by Matt's k5

do you have a 205 t case?, check the coupler sleeve in the adater between the t case and tranny the grooved teeth had almost worn out and stripped clean out i first noticed this when shifting from drive to reverse a very load clunk i replaced mine from gm worked great then my trans when out after that i had no forward gears but i had reverse, just a thought to check

Good idea.

AJs72K5 · 07-29-2008, 06:04 PM

I do have a 205. We'll check all of the above. But the only way to tell what's busted is to pull the tcase and tranny.

Jtrux · 07-29-2008, 06:16 PM

Quote:

Originally Posted by AJs72K5

I do have a 205. We'll check all of the above. But the only way to tell what's busted is to pull the tcase and tranny.

Unbolt dshafts, and you can slide the transfercast back where it is enough to get the collar out.

07-27-2008, 10:39 PM	#1
AJs72K5 Registered User Join Date: Nov 2007 Location: South Tx Posts: 1,083	Killed the tranny I think I killed the tranny in the K5 today. I knew I was gonna replace the TH350 with an overdrive at some point, but didn't expect to have to do it this soon. I was running the truck up and down the street in front of the shop. Truck was pulling hard around 4500 RPM in 2nd, it hesitated, then no more go. Coasted to a stop (the engine still runs fine). It has no forward gears 1st, 2nd, or 3rd, or reverse. Dropped the truck into 4LO, and nothing there either. I checked the fluid and it still looks clean...dipstick just say a pint low. This sucks. __________________ - AJ Gray Matter Build - 1972 K5 with some stuff

07-28-2008, 12:44 AM	#2
BLUE THUNDER Registered User Join Date: May 2007 Location: San Antonio Posts: 993	Re: Killed the tranny Dude that sucks. Keep us posted on what it is. I want to put a meet and greet together in August or early Sept. Hopefully we'll both be up and running. I'm just about to get my motor started and broken in. Hopefully my tranny works. I have no idea if it even works. You gotta come by and check it out. Gimme a shout if you need a hand. Later, Mario.

07-28-2008, 11:20 AM	#3
Critter Future TOTM Winner Join Date: Aug 2006 Location: Bulverde, TX Posts: 2,692	Re: Killed the tranny Sorry to hear that, at least now you have an "excuse" to make the 700R4upgrade. Is the tranny making any grinding noise or anything when you shift it into a gear or is it basically silent? __________________ 72 Chevy CST K5 HIGHLANDER BLAZER Getting a 6.0,NV4500,NP205,14BFF (Currently laying all over the place in little pieces) 72 Chevy swb step-side "LS" 6.0 Here's a build thread of sorts 2002 HD2500 Crew Cab, 8.1L Allison 4x4 Daily Driver Check it out www.lsdyno.com

07-28-2008, 12:15 PM	#4
AJs72K5 Registered User Join Date: Nov 2007 Location: South Tx Posts: 1,083	Re: Killed the tranny Sounds like something is whining / spinning. But no grinding when shifting thru the gears with throttle. Best case, I'm thinking I blew up the torque converter. __________________ - AJ Gray Matter Build - 1972 K5 with some stuff

07-28-2008, 02:01 PM	#5
67Steven Registered User Join Date: Mar 2007 Location: Oregon City Posts: 228	Re: Killed the tranny My guess would be the torque converter. The oil would be brown and smell 'burnt' if you had valves or something else go south in the guts (from personal experience)

07-28-2008, 02:26 PM	#6
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,271	Re: Killed the tranny Pump maybe wit the whine, at any rate it'll need to be gone through or it is the perfect time for a 700r4!

07-28-2008, 03:21 PM	#7
AJs72K5 Registered User Join Date: Nov 2007 Location: South Tx Posts: 1,083	Re: Killed the tranny I checked the dipstick with the truck off and it was about 2" up the dipstick. I then started the truck and the level on the dipstick dropped. So, fluid is at least moving somewhere. __________________ - AJ Gray Matter Build - 1972 K5 with some stuff

07-28-2008, 04:58 PM	#8
jaros44sr Registered User Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,454	Re: Killed the tranny That sucks, now ya have to withdraw from TOTM Hope it's something cheap, but trany's are never cheap __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim

07-28-2008, 05:08 PM	#9
Jtrux I'm a poor spectator Join Date: Aug 2006 Location: San Antonio, Tx Posts: 2,287	Re: Killed the tranny Nv4500!! __________________ 2006 Jeep Unlimited IMPACT ORANGE 1993 Chevy 2500 4x4 ExCab LWB 454/NV4500 Tow rig 1977 Ford F100 2x4 LWB 1st truck I owned, still have it!!! 1979 Ford F150 4x4 SWB Built Ford Tough!!! 1971 Chevy Blazer 350 / SM465 / NP205 UNDER CONSTRUCTION Soon to have a LQ4 6.0!!!

07-29-2008, 02:45 AM	#10
72truckman Registered User Join Date: Mar 2006 Location: San Ramon, California Posts: 276	Re: Killed the tranny JTRUX has the right idea!!! __________________ My 1972 Blazer 5.3 E85/ NV4500 5spd 4x4 Work in Progress http://67-72chevytrucks.com/vboard/s...d.php?t=291482 **SOLD!!!!!** 1965 GMC 4X4 http://67-72chevytrucks.com/vboard/s...d.php?t=294727

07-29-2008, 12:36 PM	#12
Matt's k5 BLAZER THIRTY!! Join Date: May 2007 Location: Utah Posts: 323	Re: Killed the tranny do you have a 205 t case?, check the coupler sleeve in the adater between the t case and tranny the grooved teeth had almost worn out and stripped clean out i first noticed this when shifting from drive to reverse a very load clunk i replaced mine from gm worked great then my trans when out after that i had no forward gears but i had reverse, just a thought to check __________________ 49 chevy 5 window 20 year project (sold)😟 57 ford fairlane (dad's car never got to it before he passed away R.I.P I LOVE YOU DAD.) 62 GMC 305 V6 custom L/B 72 HIGHLANDER K5 BLAZER 2nd owner 71 K5 MAMMA'S RIDE! 63 GMC 4X4 305 V6 62 GMC SHORT BED SERVICE BODY V6 (STUMPY) 74 GMC CUSTOM 1500 L/B Last edited by Matt's k5; 07-29-2008 at 12:38 PM.

07-29-2008, 06:04 PM	#14
AJs72K5 Registered User Join Date: Nov 2007 Location: South Tx Posts: 1,083	Re: Killed the tranny I do have a 205. We'll check all of the above. But the only way to tell what's busted is to pull the tcase and tranny. __________________ - AJ Gray Matter Build - 1972 K5 with some stuff Last edited by AJs72K5; 07-29-2008 at 06:05 PM.



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