Suggestions for manual trans conversion - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Adam12 · 10-28-2003, 10:41 PM

I have decided that since my truck will no longer be daily driven and more of a toy that I am gonna change it over from a Th400 to a stick. I want something thats gonna be good for drag racing but that I can still drive around town 10 miles a week or so. So what are some of you guys running in your trucks? Open to all suggestions as it wont be for a while til I do it.
Thanks,
Adam

Class of 69 · 10-28-2003, 10:52 PM

As Crazy L would say...deep gears, and a 6 speed!!! Ultimate street fighter.

crazy longhorn · 10-28-2003, 11:10 PM

The richmond trans was not a cheap swap, but it sure is fun to drive! With 4.10 gears on a 28" tall tire, I can crusie 80mph @ 3000 rpms in 6th. The thing "dances" when the throttle is opened up too...

I am still thinking about trying out my 3.40 gears, as with a 3.28 1st gear I should still have plenty of "giddyup"& will be able to cruise 65 mph @ 2000 rpms on the hyway. with the price of gas, a little more milage cant hurt. Good luck, crazyL

*rage'nrat638* · 10-29-2003, 12:00 AM

KEEP THE TH400 AND STICK THIS IN THERE.....

DART638 C.I. 850 H.P........GOOD FOR THE DRAG STRIP...
AND AROUND TOWN

Adam12 · 10-29-2003, 01:32 AM

hehe the motor I have isint too bad I still have to get it dynoed but I'm 90% sure its over 450 hp its not 850 but its not slow thats for sure. would a stick be that much better for the track? I know it would be a lot funner

Crazy L about how much did it cost and how much fab did you have to do?

crazy longhorn · 10-29-2003, 02:24 AM

Jegs & summit both have the trans for around $3000. to add to that, I have a Hays billet flywheel, & a Centerforce dual friction clutch set. All the parts /hardware was just a little shy of $4000. Im not running on the strip, so I dont have a scattersheild(just ran the stock bell. The trans is close enough to the same lenght as a 400 t(within a fraction of an inch), & takes a 400 slip yolk. I swapped from a 400 t, & didnt have any driveline mods. The mount is in a different spot as far as front to back, & also height. other than building a custom crossmember, it was a pretty straight foward swap. You may have a little mod to do on the floor pan (hump) in the shifter area, as the shifter does sit pretty high on the trans(my floor had been modified after a body drop), to fit the 400t that I ran for several yrs, so other than building a box to go aruond the shifter it all fit. I am running the stock clutch linkage,however it is modified to fit my eng setback, &the top rod has been moved to the left on the firewall to straighten the "push". it also has rod ends to make things work "slicker". I bet that 481 does run good! Good luck,crazyL

Hooter · 10-29-2003, 02:27 AM

man dont make me drool all over my keyboard again

10-28-2003, 10:41 PM	#1
Adam12 I hate trannys Join Date: Dec 2001 Location: Bakersfield,CA Posts: 160	Suggestions for manual trans conversion I have decided that since my truck will no longer be daily driven and more of a toy that I am gonna change it over from a Th400 to a stick. I want something thats gonna be good for drag racing but that I can still drive around town 10 miles a week or so. So what are some of you guys running in your trucks? Open to all suggestions as it wont be for a while til I do it. Thanks, Adam __________________ 70 SWB 481 ci, TH-400, Edlebrok Victor Jr. intake, Holley street avenger 770, Dynomax ceramic coated headers. Dual flowmasters. and only 3516134 more little things to do.

10-28-2003, 10:52 PM	#2
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	As Crazy L would say...deep gears, and a 6 speed!!! Ultimate street fighter. __________________ 69 GMC K10 ..some restoration required....still..

10-28-2003, 11:10 PM	#3
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	The richmond trans was not a cheap swap, but it sure is fun to drive! With 4.10 gears on a 28" tall tire, I can crusie 80mph @ 3000 rpms in 6th. The thing "dances" when the throttle is opened up too... I am still thinking about trying out my 3.40 gears, as with a 3.28 1st gear I should still have plenty of "giddyup"& will be able to cruise 65 mph @ 2000 rpms on the hyway. with the price of gas, a little more milage cant hurt. Good luck, crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

10-29-2003, 12:00 AM	#4
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	KEEP THE TH400 AND STICK THIS IN THERE..... DART638 C.I. 850 H.P........GOOD FOR THE DRAG STRIP... AND AROUND TOWN Last edited by rage'nrat638; 07-12-2007 at 07:08 AM.

10-29-2003, 01:32 AM	#5
Adam12 I hate trannys Join Date: Dec 2001 Location: Bakersfield,CA Posts: 160	hehe the motor I have isint too bad I still have to get it dynoed but I'm 90% sure its over 450 hp its not 850 but its not slow thats for sure. would a stick be that much better for the track? I know it would be a lot funner Crazy L about how much did it cost and how much fab did you have to do? __________________ 70 SWB 481 ci, TH-400, Edlebrok Victor Jr. intake, Holley street avenger 770, Dynomax ceramic coated headers. Dual flowmasters. and only 3516134 more little things to do.

10-29-2003, 02:24 AM	#6
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	Jegs & summit both have the trans for around $3000. to add to that, I have a Hays billet flywheel, & a Centerforce dual friction clutch set. All the parts /hardware was just a little shy of $4000. Im not running on the strip, so I dont have a scattersheild(just ran the stock bell. The trans is close enough to the same lenght as a 400 t(within a fraction of an inch), & takes a 400 slip yolk. I swapped from a 400 t, & didnt have any driveline mods. The mount is in a different spot as far as front to back, & also height. other than building a custom crossmember, it was a pretty straight foward swap. You may have a little mod to do on the floor pan (hump) in the shifter area, as the shifter does sit pretty high on the trans(my floor had been modified after a body drop), to fit the 400t that I ran for several yrs, so other than building a box to go aruond the shifter it all fit. I am running the stock clutch linkage,however it is modified to fit my eng setback, &the top rod has been moved to the left on the firewall to straighten the "push". it also has rod ends to make things work "slicker". I bet that 481 does run good! Good luck,crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

10-29-2003, 02:27 AM	#7
Hooter My other Love Join Date: Aug 2001 Location: Castlegar B.C. Canada Posts: 4,085	man dont make me drool all over my keyboard again __________________ Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life



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