Tranny / tcase problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Redcap · 10-27-2011, 08:17 PM

Quote:

Originally Posted by DirtyLarry

Torsional stress. The engine naturally wants to lift up and twist when under load (even with good engine mounts) then you have the tcase tied to the frame on the passenger’s side. Something in between is going to eventually break. GM later tied the aluminum transfercases (and some 205s) to the bellhousing by way of a long strut rod instead of tying it to the frame, which is fine. Bolting the transfercase to the frame was a bad idea.

Exactly.

BLAZERMAN · 10-27-2011, 11:07 PM

I'm guilty of this myself...I had no trouble or leaks till I replaced my soft worn rubber transmission and transfer case mounts with poly, allowing virtually no movement at all. It didnt take long to develop a nasty leak from a crack in the adapter.

1malo68 · 10-28-2011, 05:49 AM

Thanks Larry! It makes sense to me now and Blazerman just confirmed it!

OrrieG · 11-10-2011, 02:05 PM

Thanks for the info guys, looks like I will be removing the bracket I fabbed because I thought it was missing. My drive train came out of a 74, xfer had the holes drilled and tapped. I drove it for 15 years without one with no problems (did have the engine chained to the frame on drivers side to limit torque) but thought I would make it "correct" this time.

eric67m · 11-10-2011, 05:17 PM

That bracket/mount also has rubber bushings? My truck did not have one but I added one during my"rebuild". Sounds like maybe I should take it off....
Posted via Mobile Device

10-27-2011, 11:07 PM	#2
BLAZERMAN Currently Blazerless Join Date: Apr 2000 Location: St. Joseph Mo. Posts: 4,826	Re: Tranny / tcase problem I'm guilty of this myself...I had no trouble or leaks till I replaced my soft worn rubber transmission and transfer case mounts with poly, allowing virtually no movement at all. It didnt take long to develop a nasty leak from a crack in the adapter. __________________ 1972 C/30 133" W.B. C&C 1970 GMC 3500 157" W.B. single wheel C&C

10-28-2011, 05:49 AM	#3
1malo68 Registered User Join Date: Aug 2010 Location: Lost Wages, NV Posts: 201	Re: Tranny / tcase problem Thanks Larry! It makes sense to me now and Blazerman just confirmed it! __________________ 1968 K10/30 *Frame Off Project "Overkill"* My 5 year, $30,000.00 toy

11-10-2011, 02:05 PM	#4
OrrieG Registered User Join Date: Jun 2006 Location: Idaho Posts: 8,800	Re: Tranny / tcase problem Thanks for the info guys, looks like I will be removing the bracket I fabbed because I thought it was missing. My drive train came out of a 74, xfer had the holes drilled and tapped. I drove it for 15 years without one with no problems (did have the engine chained to the frame on drivers side to limit torque) but thought I would make it "correct" this time. __________________ 1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project

11-10-2011, 05:17 PM	#5
eric67m Registered User Join Date: Apr 2005 Location: Monroe, WA Posts: 298	Re: Tranny / tcase problem That bracket/mount also has rubber bushings? My truck did not have one but I added one during my"rebuild". Sounds like maybe I should take it off.... Posted via Mobile Device __________________ 67 K10, lwb, fleetside, 327, 4spd, 205, cab and 3/4 frame swap, 14 bolt, big window, and a "rustoleum roll job"



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.