auto to manual conversion

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Jan 20, 2008 | 01:41 PM

maddmickey

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Posts: 122

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From: Enterprise Ut

auto to manual conversion

I will be putting a muncie in my 74 this spring. It has the th400 in it now. If I buy a trans mount for a four speed will it bolt right to the crossmember, or is there an adapter plate I have to use?

Thanks

Jan 20, 2008 | 01:45 PM

A88FXRS

Racer

Joined: Dec 2007

Posts: 374

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From: PHILADELPHIA PA

Can Bolt To Crossmember. Will Need Shifter Bracket, Clutch Crosshaft Bracket Welded On Frame, Pedal And Linkage. Then Change Shift Plate & Boot .

Jan 20, 2008 | 01:47 PM

flstfi

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Joined: Sep 2006

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I have a Similar delima

I have a 77 with a th350. I am not stuck on originality so I plan on installing a keisler 5 speed. I just get tired of rolling down the hwy feeling like I am in 2nd gear. My friend installed one and the kit includes everything including the mounts

Jan 20, 2008 | 02:10 PM

maddmickey

Thread Starter

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From: Enterprise Ut

I hear you flstfi. The reason im doing a muncie is because I got it from a friend cheap. If I had the cash I would definitly do the overdrive, and maybee in the future who knows. Good luck on your project.

And thanks for the info A88fxrs

Jan 20, 2008 | 03:12 PM

Binnie77

Drifting

Joined: Jan 2001

Posts: 1,841

Likes: 3

From: Halifax, NS, Canada

Quote:

Originally Posted by flstfi

One of the best investments you will ever make in your car. You will even enjoy it more if you switch from 3.08 gears to something in the order of 3.55

http://corvettec3.ca/tko.htm

Jan 20, 2008 | 03:42 PM

sperkins

Le Mans Master

Joined: Oct 2005

Posts: 9,429

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From: Macon, GA

Trans mount is the same for Muncie and TH350. Should be an easy find.

Jan 20, 2008 | 04:49 PM

bt57

Instructor

Joined: Jun 2007

Posts: 129

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From: dallas pa

if it is a early muncie-10 spline you will need a th350 slip yoke

Jan 20, 2008 | 08:16 PM

ikwhite

Pro

Joined: Apr 2006

Posts: 733

Likes: 1

From: Coquitlam British Columbia

Clutch Crosshaft Bracket Welded On Frame

Quote:

Originally Posted by A88FXRS

Can Bolt To Crossmember. Will Need Shifter Bracket, Clutch Crosshaft Bracket Welded On Frame, Pedal And Linkage. Then Change Shift Plate & Boot .

I think if you look at the earlier 78 thru 81 Clutch stud Crosshaft Bracket it is a bolt on for about $17 bucks and you will not have to weld it in place as you would with a later model yr bracket as mentioned above. Just another alternative you may want to look at.

ikwhite

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Jan 21, 2008 | 10:40 AM

birdsmith

Melting Slicks

Joined: Feb 2006

Posts: 3,428

Likes: 5

From: Japan

To answer what I think was your original question, there is a large bracket that bolts onto the front of the crossmember that the actual trans mount bolts to. In order to install the bracket you'll have to weld an angle onto the front face of your crossmember to attach it. It goes on with four bolts; two down through the top and one into each side through the welded-on angle. The mount itself is the same for TH350,TH400, Muncie, or T10 transmissions. Also, if you use a Hurst shifter you can forego the shifter bracket as it bolts directly to the side of the trans. tail housing.

Jan 22, 2008 | 09:41 AM

#10

BerniesVette

Melting Slicks

Joined: Oct 2004

Posts: 2,662

Likes: 8

From: Knoxville Tennessee

Go ahead and install a 5 speed overdrive and go with a hydraulic clutch setup. It is the only way to go.

Caveman

Jan 22, 2008 | 10:00 AM

#11

Binnie77

Drifting

Joined: Jan 2001

Posts: 1,841

Likes: 3

From: Halifax, NS, Canada

Quote:

Originally Posted by BerniesVette

Go ahead and install a 5 speed overdrive and go with a hydraulic clutch setup. It is the only way to go.

Caveman

Jan 22, 2008 | 02:29 PM

#12

globey

Intermediate

Joined: Apr 2007

Posts: 38

Likes: 0

Why 5 speed ? why not 6 speed ? just about the same price

globey

Jan 22, 2008 | 02:52 PM

#13

rj8806

Melting Slicks

Joined: May 2005

Posts: 2,826

Likes: 3

From: Tennessee

Quote:

Originally Posted by globey

Why 5 speed ? why not 6 speed ? just about the same price

globey

Either or....the point was get an overdrive.

The 6 speed will require some creative modifications but the 5 speeds are tried and true and there are kits already available.

Richard
Tech Support
Keisler Engineering

Jan 22, 2008 | 06:35 PM

#14

murraybs

Racer

Joined: Apr 2007

Posts: 361

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From: Sacramento (Citrus Heights) California

Quote:

Originally Posted by rj8806

Either or....the point was get an overdrive.

The 6 speed will require some creative modifications but the 5 speeds are tried and true and there are kits already available.

Richard
Tech Support
Keisler Engineering

Creative, shade-tree engineering to fit a 6sp

and an overdrive really is the way to go but double overdrive is just that much cooler.

OT:
Rich, when are you guys going to be getting the 6sp kits back into production (or are you)?
If the problem is a shortage of T56s, can I send you my T56's tailhousing and have you do your special massaging on it?

Jan 23, 2008 | 01:16 PM

#15

0GENE-KEISLER SALES

Former Vendor

Joined: Aug 2005

Posts: 322

Likes: 0

From: knoxville tn

Quote:

Originally Posted by murraybs

Creative, shade-tree engineering to fit a 6sp

We are actually not going to get back into this. The single biggest issue with the kit was fitment. It worked well for a couple and not others. Plus the .50 drop is typically to much for a carburated motor. They typically don't like to drop that low under load.

I personally owned 2 Camaros one Lt and one Ls. if i was in 6th gear at say 70-75 I had to drop a gear just to go up a slight hill or accelerate.

That was with a computer controlled fuel injected motor.

The 5speed has plenty of od with either .68 or .64. plus its already a well thought out kit.

Good Luck

Gene

Jan 23, 2008 | 01:50 PM

#16

darklordftt

Racer

Joined: May 2006

Posts: 259

Likes: 8

From: Shortsville NY

Quote:

Originally Posted by Binnie77

One of the best investments you will ever make in your car. You will even enjoy it more if you switch from 3.08 gears to something in the order of 3.55

http://corvettec3.ca/tko.htm

omg, thank you for the link and all the info you documented on your corvette... I've been looking into doing a tranny and engine swap on my '81, and a lot of my questions just got answered.