TH 400 Pops Out Of Gear - The 1947 - Present Chevrolet & GMC Truck Message Board Network

RipMeyer · 04-04-2002, 02:13 AM

TH 400 pops out of gear from a semi quick start. Its dark right now and I only took a quick look. looked at the tranny mounts and look briefly at the motor mounts, they appear to be ok. It seems that the tranny may be moving and it pops out of gear.

any suggestions?

Eric

Project1970 · 04-04-2002, 02:30 AM

Sounds like what mine did when I just got it put in; it was motor mounts. I can't remember exactly how I was told to check it (called up the guy who did it, explained it to him, he said do this, it did it, and yep, the mounts were trashed) but it was have the hood up and rev the engine with someone watching the engine...I don't remember if it's supposed to be in gear or not =P

Basically, if the engine jumps...motor mounts.

------------------
Project 1970 - soon to be seen at http://milhouse.treylis.org:81/

mrein3 · 04-04-2002, 07:30 AM

One foot on the brake, one on the gas, tranny in gear. Rev the engine. Forward checks one engine mount, reverse checks the other.

Be careful!

*Fast68Chevy* · 04-04-2002, 10:57 PM

driver side lifts up in forward gear, reverse lifts the pass side mount, engine and driveshaft spin clockwise facing front of truck, also dizzy does too, cant tell that the mount is separated from its metal back until you rev engine in forward gear, or jack up engine

good luck

------------------
Randy- Lincoln, IL
r68c30@hotmail.com

71 C-10, trying to assemble....sigh..
parting out 5.0LTPI '81 cutlass supreme brougham
*Paint is overrated
© RSS Enterprises 2000

04-04-2002, 02:13 AM	#1
RipMeyer Registered User Join Date: Oct 2001 Location: Southern New Mexico Posts: 649	TH 400 Pops Out Of Gear TH 400 pops out of gear from a semi quick start. Its dark right now and I only took a quick look. looked at the tranny mounts and look briefly at the motor mounts, they appear to be ok. It seems that the tranny may be moving and it pops out of gear. any suggestions? Eric

04-04-2002, 02:30 AM	#2
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	Sounds like what mine did when I just got it put in; it was motor mounts. I can't remember exactly how I was told to check it (called up the guy who did it, explained it to him, he said do this, it did it, and yep, the mounts were trashed) but it was have the hood up and rev the engine with someone watching the engine...I don't remember if it's supposed to be in gear or not =P Basically, if the engine jumps...motor mounts. ------------------ Project 1970 - soon to be seen at http://milhouse.treylis.org:81/ __________________ Project1970 - LS1 Swap Complete!

04-04-2002, 07:30 AM	#3
mrein3 Registered User Join Date: Feb 2000 Location: Center City, MN, USA Posts: 3,254	One foot on the brake, one on the gas, tranny in gear. Rev the engine. Forward checks one engine mount, reverse checks the other. Be careful! __________________ '70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN

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04-04-2002, 10:57 PM	#4
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	driver side lifts up in forward gear, reverse lifts the pass side mount, engine and driveshaft spin clockwise facing front of truck, also dizzy does too, cant tell that the mount is separated from its metal back until you rev engine in forward gear, or jack up engine good luck ------------------ Randy- Lincoln, IL r68c30@hotmail.com 71 C-10, trying to assemble....sigh.. parting out 5.0LTPI '81 cutlass supreme brougham *Paint is overrated © RSS Enterprises 2000



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