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#26 | |
Windy Corner of a Dirty Street
Join Date: Jun 2003
Location: Pueblo West, Colorado
Posts: 2,926
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Re: Tranny / tcase problem
Quote:
Sorry but I still harbor suspicion with you from THIS Pirate deal from a few years ago. Post #70 at Pirate. Once you play forum games like that it is hard to recoup yourself with guys older than you that still have good memories.
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Current vehicle collection: 1978 Chevrolet K10, 8.1L, NV4500, NP205 1989 Chevrolet Suburban, 8.1L, NV4500, NP241 1993 Chevrolet C1500 Sportside, TBI 7.4L, 4L60E 2001 Chevrolet K2500HD, Ext Cab, SWB, 8.1L, ZF 6 speed 2014 Chevrolet Impala LTZ 3.6L Vortec 8.1L because life is too short to tolerate underpowered vehicles
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#27 |
What?
Join Date: Jun 2007
Location: Southern California
Posts: 7,617
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Re: Tranny / tcase problem
Interesting.
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Chris 1968 K20 Suburban 1972 K10 LWB PU |
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#28 |
Registered User
Join Date: May 2010
Location: Lewis County, WA
Posts: 1,523
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Re: Tranny / tcase problem
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#29 | |
K5Camper
![]() Join Date: Mar 2004
Location: Pueblo, CO
Posts: 1,513
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Re: Tranny / tcase problem
Quote:
Maybe I haven't had enough beer yet.
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Rob Z. 1975 K5 350/465/205/D44/12b 4" lift on 35's- RIP 1991 K5 8.1L/NV4500/241/D44/14b FWC Camper |
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#30 |
Kid's Mechanic
Join Date: Nov 2006
Location: Kansas City
Posts: 8,241
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Re: Tranny / tcase problem
Looks like we have a difference of opinion ,So lets hold the outside this forum battle down....
However My opinion mirrors Larry's . I run an 84 3/4 mudder 3 years racing in a bunch of pits around Kansas City . 350 turbo and a 205 transfer . No transfer brackets no rods from the mounts. I beat on that thing hard , from the time the green flag dropped till i run out or the red flag was thrown I never lifted . No problems with adapters , No problem with transmission housings . 1 year and a 1/2 I run it as a long bed , Then as a short bed . |
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#31 |
Registered User
Join Date: Jan 2011
Location: Townsend MT
Posts: 1,725
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Re: Tranny / tcase problem
I will never ever use my truck that hard (I have others for that). I will still get a brace rod. I don't know why.
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#32 |
Kid's Mechanic
Join Date: Nov 2006
Location: Kansas City
Posts: 8,241
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Re: Tranny / tcase problem
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#33 |
Registered User
Join Date: May 2009
Location: Pinehurst, Idaho
Posts: 311
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Re: Tranny / tcase problem
I've had plenty of beer but still confused by this
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#34 | |
Registered User
Join Date: Jul 2011
Location: Navarre Fl
Posts: 93
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Re: Tranny / tcase problem
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QUOTE: DirtyLarry you can call BS, but this is the voice of experience. I shatter my trans casing and that was with the frame attachment. I was just giving my two cents. Thats why it broke there was no give between engine, trans, and tcase with ur t case tied to the frame so it gave way at the weakest link a.k.a that adapter with the 4 bolts to the trans without it being tied to the frame the eng trans and t case torque as a whole on the engine and trans mounts. think about it this way. you have a peice of paper write engine on one end, trans in the middle and tcase on the end. grab each end and pull it kinda snug twist the side with the engine written on it simulating torque from the engine, and leave the t case side still simulating it being bolted to the frame. Where does the twisting occure? in the middle or the "trans". now that same peice of paper twist again and let the t case side twist with the engine side simulating it being on rubber bushings and theres no stree in the middle. All the stress goes to the eng mounts and the trans mounts once they bottom out the bushings and set on the solid frame. Now nothing can flex any more than something else its all one solid peice. Hope it helps ya get the picture 1 ton
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82 k10 350sbc, sm465, np205, dana 60 front 14 bolt ff rear 4 inch susp lift 33's aka "MUD SLUT" 2007 cbr 1000rr ![]() Last edited by mud slut 350; 12-25-2011 at 10:45 AM. |
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#35 |
Too many projects
Join Date: Mar 2004
Location: Fargo, ND land of the flat hills
Posts: 1,147
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Re: Tranny / tcase problem
I'm dragging this back up for another question on NP205 support. Looking for Larry's advice on the matter, knowing his level of experience.
I clocked the 205 behind my Cummins/NV5600 flat with a Trail Tech Fab adapter. At the same time I ordered their NP205 support kit. It attaches to the rear of the case, opposite the front driveline and features a poly bushing. Any opinions on this means of support? It is closer to the center than a stock frame mount and does have a bushing. Adapter (stock photo, mine is welded up and installed so no good pictures) Support kit I haven't welded up the support kit, so opinions are welcome.
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Andrew 84 GMC C1500 SWB 6.2 Diesel/700R4/3.42 "Grandpa's odd duck" |
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#36 |
Registered User
Join Date: Dec 2011
Location: Creighton Sask. Canada
Posts: 4,121
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Re: Tranny / tcase problem
My sm465 in my 71 doesn't have one, glad now, noticed it was missing but my engine is chained to the frame (with 3/4" slack) to help. Got to control the HP.
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#37 |
Too many projects
Join Date: Mar 2004
Location: Fargo, ND land of the flat hills
Posts: 1,147
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Re: Tranny / tcase problem
I'll be about 350 hp / 800 lb-ft once I finish turning up the Cummins. I've held back on playing with the pump until everything else is beefed up and this is one of the last things to do.
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Andrew 84 GMC C1500 SWB 6.2 Diesel/700R4/3.42 "Grandpa's odd duck" |
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#38 |
Senior Member
Join Date: May 2004
Location: Binghamton, NY
Posts: 3,460
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Re: Tranny / tcase problem
The last truck I built was a 454 4-speed with a later 205. Had 35" tires on it. I didn't beat the crap out of it, but gotta have some fun with a big block stick truck. That didn't have a brace on it. All the trucks I've owned, worked on, stripped parts off of in a junkyard, DIDN'T have that brace. Even with a small block, when you jump on it you can feel the drivetrain twist, shifter can move 3-4" maybe more. If you have that brace on there, the one piece is trying to hold the entire drivetrain from twisting. The t-case itself isn't gonna break, the wee little adapter is gonna take the force of it. I've had some 80s trucks with the 208 that had braces to went to the bell housing, but took them off and still didn't have a problem.
If you want to brace or add some support, that brace shown above would OK. Or some other type, but it needs bushings so it can flex with the rest of the drivetrain.
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2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 6” lift 1999 GMC Yukon 350/4L60 4" SAS |
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#39 |
Senior Member
![]() Join Date: Aug 2008
Location: Long Beach, CA
Posts: 1,813
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Re: Tranny / tcase problem
This thread is an interesting read. It is true that the T/C torque mount would be the cause of adapter and bellhousing failures.
I do see that some on here have said they weren't used on 73 and up trucks. I'm wondering about the validity of that statement only because my 73 K20 had the mount. Not to say that someone didn't add it on later, thinking it was necessary. I'm wondering when GM truly did stop using them. Also, does anyone have a picture of what the alternative torque rod looks like? I've never seen this before.
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Jason M. @argonaut62 1972 K5 Blazer CST, Turquoise 1966 K20 Short Fleet Pickup, Big Ugly 1964 C10 Short Fleet, Gertrude 2001 Porsche 911 Carrera 1996 Ford Bronco XLT 1980 Jeep Wagoneer 2008 Honda CBR1000RR 2005 Honda RC51 1981 Honda CB750C No dis-assemble Johnny Five! No dis-assemble! |
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#40 |
Registered User
Join Date: May 2010
Location: Lewis County, WA
Posts: 1,523
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Re: Tranny / tcase problem
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#41 |
Registered User
Join Date: Feb 2012
Location: Ruskin Florida
Posts: 4,563
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Re: Tranny / tcase problem
I ran without that bracket for over ten years beating the he!! out of my drive train with 36" Swampers. I did snap my adapter during a head on 55 mph accident though. When I went to replace it I spoke to a shop that rebuilds t-cases and that's it. They told me the one I had was a weak version. It had a support bearing. They said to get the one without that bearing as the casting was much stronger. I have two now just in case. I have that strut but cannot use it as I have a crawl box. If any one wants it for shipping costs it's free! I will recycle my t-case frame brackets...
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70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350 |
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#42 |
Senior Member
![]() Join Date: Aug 2008
Location: Long Beach, CA
Posts: 1,813
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Re: Tranny / tcase problem
I'll take you up on the strut.
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Jason M. @argonaut62 1972 K5 Blazer CST, Turquoise 1966 K20 Short Fleet Pickup, Big Ugly 1964 C10 Short Fleet, Gertrude 2001 Porsche 911 Carrera 1996 Ford Bronco XLT 1980 Jeep Wagoneer 2008 Honda CBR1000RR 2005 Honda RC51 1981 Honda CB750C No dis-assemble Johnny Five! No dis-assemble! |
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#43 | |
Windy Corner of a Dirty Street
Join Date: Jun 2003
Location: Pueblo West, Colorado
Posts: 2,926
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Re: Tranny / tcase problem
Quote:
__________________
Current vehicle collection: 1978 Chevrolet K10, 8.1L, NV4500, NP205 1989 Chevrolet Suburban, 8.1L, NV4500, NP241 1993 Chevrolet C1500 Sportside, TBI 7.4L, 4L60E 2001 Chevrolet K2500HD, Ext Cab, SWB, 8.1L, ZF 6 speed 2014 Chevrolet Impala LTZ 3.6L Vortec 8.1L because life is too short to tolerate underpowered vehicles
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#44 |
Registered User
Join Date: Jun 2012
Location: Montreal, Quebec, Canada
Posts: 27
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Re: Tranny / tcase problem
This is an interesting topic, I am currently in the final steps of a 72 K20 build with car 427BBC/NV4500/6 bolt round pattern NP205. the powertrain is mounted to an 86 K30 motor and transmission crossmembers with 86 motor and trans mounts. I also installed the tcase to frame bracket. Should I remove the side T/C mount without adding anything else in place? Is this not to much cantilever weight for the NV4500 aluminum tailhousing? NOW is the time to do something before she's back on the road.
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#45 |
Registered User
Join Date: Jul 2010
Location: Knoxville,TN
Posts: 1,185
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Re: Tranny / tcase problem
With the 4spd long adapter they tend to be weak to start with.
Those builder t-case supports do more damage than without and mixing poly and rubber.
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1972 Custom Deluxe 20 4x4 burb 1971 GMC SWB CST 4x4 1972 GMC k20 4x4 (X- brush truck ) 1971 Chevy CST Blazer 4x4 1971 Chevy C/10 1970 Cab Chassis C30 157" 1971 Cab Chassis Custom 30 Deluxe 157" 292/4spd ( Napco Replica ) 1988 Chevy V30 4x4 wrecker challenger 4812 |
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#46 | |
Registered User
Join Date: Mar 2013
Location: Campbellsville, KY
Posts: 888
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Re: Tranny / tcase problem
Quote:
FWIW, originally the truck was a 454/auto (currently has a TH350, not sure if it's original or not) with an NP205 and a few HD suspension options - shocks and front springs, IIRC.
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Alex V. ------ 1967 C10 Suburban, 350/NP435, Green/Green, PS, PB, HD cooling, charging, shocks, and springs. 1985 GMC C3500 SRW, Sierra Classic, 454/TH400, white/blue. |
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#47 |
Registered User
Join Date: Jun 2012
Location: Montreal, Quebec, Canada
Posts: 27
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Re: Tranny / tcase problem
What about making some sort of "pinion snubber" type of bumper on the skid plate just to support the overhanging weight of the 205 on that aluminum nv4500 tail housing?
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72 K20 ![]() |
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#48 |
Senior Member
![]() Join Date: Mar 2012
Location: ripley ny
Posts: 2,906
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Re: Tranny / tcase problem
glad i found this thread, i just bought new bushing kit for the t/c bracket on my '69 k20 now im thinkin bout leaving it off>>>>thanx 4 this info
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#49 |
Registered User
Join Date: Feb 2016
Location: Ottawa Ontario
Posts: 41
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Re: Tranny / tcase problem
Again old threads save patts. Looking around for thr new bushing stumbled me on to this thread . Bracket is stay in the boxes ramjet 350 700r4 205 in a 69 blazer .
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#50 |
Registered User
Join Date: Dec 2009
Location: El Dorado Ca
Posts: 3,374
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Re: Tranny / tcase problem
great info. thanks for bringing up this old thread, I think my son's truck has the brace on it, It will be removed tomorrow!
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