Need help t-5 5 speed trans - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rigon4 · 11-17-2009, 11:12 PM

Ok i got a 400 ci small block and a t-5 out of a 87 trans am for free that my friend just got because i talked the price down by half for the car "My friend wanted the bolt in ford 9 inch out of it for his 86 ta" So how do i know if it is a v8 trans the number on it is WG 13-52-157 Thanks Jeff

rigon4 · 11-18-2009, 04:50 PM

ttt anyone??

SGTHohensee · 11-18-2009, 09:30 PM

Honestly, it won't matter. I've seen 290hp 350's destroy V8 T5's. They're notoriously weak. Even a "World Class" Mustang T5's won't live long behind a torquey small block. All that said, yes yours is a V8 T5.

1352-157 GMC 1986 V8 F Cars V8 LG4-LG9 U 2.76 2.95 1.94 1.34 1.00 0.63

Here's your id guide.

T5 ID Guide

Back in Black 66 · 11-19-2009, 07:04 AM

I have personal experience with those weak tranny's. had one in my 66 short step side with a 350hp small block. the trans went out in two months. these trucks are to heavy and as stated above 290hp or up and they crumble.

68 TT · 11-19-2009, 10:08 AM

Behind a 400 in a truck it won't last a week.

GM wouldn't even allow you to order the TPI 350 with the T-5. It is just plain a weak trans.

I went through a pile of T-5's in my 83 Z/28 and it only weighed 3400 pounds and had a mild 305. Now imagine the torque of a 400 and a 4000+ pound truck.

rigon4 · 11-19-2009, 12:15 PM

It will not have the 400 in it but worse I have a very strong 355 I had built for my 2wd 81 blazer I was thinking t-5 instead of th400 than put 4.56 in the rear and not the 3.73/4.11 I want

68 TT · 11-19-2009, 12:45 PM

Quote:

Originally Posted by rigon4

It will not have the 400 in it but worse I have a very strong 355 I had built for my 2wd 81 blazer I was thinking t-5 instead of th400 than put 4.56 in the rear and not the 3.73/4.11 I want

I would sell it and find a T-56. They are rated for about 425 hp from the factory depending upon which vintage you get and have the aftermarket support to make them live in 9-second drag cars and 600+ hp Vipers so it should work great in your Blazer.

The double overdrive is pretty nice too. My 98 Camaro had the T-56. After I put in 4.10 gears I was still only at 1900 RPM at 70 mph in 6th with tires that were under 26" tall.

gmclowsierra · 11-19-2009, 06:45 PM

dont do it . my buddy has a 400 with a t5 and blew the bottom of the case apart, we have it down to a science to change, 45 minutes in and out

Damien · 11-20-2009, 12:23 PM

Wow, I knew these weren't the strongest transmissions, but I didn't know they were that bad. I'm glad I decided not to use one behind my 4.3. I was afraid this might happen and I would be out the cost of the clutch and flywheel.

11-17-2009, 11:12 PM	#1
rigon4 Registered User Join Date: Mar 2006 Location: east syracuse ny Posts: 371	Need help t-5 5 speed trans Ok i got a 400 ci small block and a t-5 out of a 87 trans am for free that my friend just got because i talked the price down by half for the car "My friend wanted the bolt in ford 9 inch out of it for his 86 ta" So how do i know if it is a v8 trans the number on it is WG 13-52-157 Thanks Jeff __________________ 1981 K-5 Blazer 2wd 1985 C-10 Short step 1988 C-10 Suburban

11-18-2009, 04:50 PM	#2
rigon4 Registered User Join Date: Mar 2006 Location: east syracuse ny Posts: 371	Re: Need help t-5 5 speed trans ttt anyone?? __________________ 1981 K-5 Blazer 2wd 1985 C-10 Short step 1988 C-10 Suburban

11-18-2009, 09:30 PM	#3
SGTHohensee Registered User Join Date: Nov 2009 Location: Smyrna Tennessee Posts: 15	Re: Need help t-5 5 speed trans Honestly, it won't matter. I've seen 290hp 350's destroy V8 T5's. They're notoriously weak. Even a "World Class" Mustang T5's won't live long behind a torquey small block. All that said, yes yours is a V8 T5. 1352-157 GMC 1986 V8 F Cars V8 LG4-LG9 U 2.76 2.95 1.94 1.34 1.00 0.63 Here's your id guide. T5 ID Guide __________________ Josh Hohensee 1996 Caprice, Cammed, Stalled, Geared, Nitrous'd, Way faster than the rest of my junk. 1985 Nissan 720, Static slammed and slow Coming Soon: 1989 R2500 CCLB single tire Last edited by SGTHohensee; 11-18-2009 at 09:31 PM.

11-19-2009, 07:04 AM	#4
Back in Black 66 Registered User Join Date: Jun 2005 Location: Phoenix AZ Posts: 32	Re: Need help t-5 5 speed trans I have personal experience with those weak tranny's. had one in my 66 short step side with a 350hp small block. the trans went out in two months. these trucks are to heavy and as stated above 290hp or up and they crumble.

11-19-2009, 10:08 AM	#5
68 TT Still plays with trucks Join Date: Jul 2009 Location: Spokane, WA Posts: 3,556	Re: Need help t-5 5 speed trans Behind a 400 in a truck it won't last a week. GM wouldn't even allow you to order the TPI 350 with the T-5. It is just plain a weak trans. I went through a pile of T-5's in my 83 Z/28 and it only weighed 3400 pounds and had a mild 305. Now imagine the torque of a 400 and a 4000+ pound truck. __________________ miSSed opportunity - ground up creation of an AWD 1994 454 SS that never was http://67-72chevytrucks.com/vboard/s...d.php?t=795577 69 C10 shortbed stepside 400 small block - built like what a super sport truck could have been 69 K20 lwb TBI 350 4L60E NP208 14-bolt Dana-44 w/disc 68 Camaro SS / RS 500hp 439 inch roller cam big block 4L80E 79 Malibu TPI 350 4L60 w/ Z28 steering & sway bars

11-19-2009, 12:15 PM	#6
rigon4 Registered User Join Date: Mar 2006 Location: east syracuse ny Posts: 371	Re: Need help t-5 5 speed trans It will not have the 400 in it but worse I have a very strong 355 I had built for my 2wd 81 blazer I was thinking t-5 instead of th400 than put 4.56 in the rear and not the 3.73/4.11 I want __________________ 1981 K-5 Blazer 2wd 1985 C-10 Short step 1988 C-10 Suburban

11-19-2009, 06:45 PM	#8
gmclowsierra Registered User Join Date: Mar 2008 Location: williamsport,pa Posts: 329	Re: Need help t-5 5 speed trans dont do it . my buddy has a 400 with a t5 and blew the bottom of the case apart, we have it down to a science to change, 45 minutes in and out

11-20-2009, 12:23 PM	#9
Damien Registered User Join Date: Mar 2007 Location: Farmington, MN Posts: 928	Re: Need help t-5 5 speed trans Wow, I knew these weren't the strongest transmissions, but I didn't know they were that bad. I'm glad I decided not to use one behind my 4.3. I was afraid this might happen and I would be out the cost of the clutch and flywheel. __________________ I can still count my vehicles on two... wait three hands.



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