Metric 200 - What do I need to make one last

KennyAnderson · 06-01-2020, 03:46 PM

Good Afternoon guys. It's time to start converting our 93 Z28 IHRA pure stock car over to be NHRA legal. Car is 90% ready it just needs a drivetrain. I already have a motor, next up is a tranny. Of course I had a good TH350 that I sold recently.....DOH! I also have a Metric 200 but it's bone stock. I have a few options for tranny builders but I wanted to pick your brains a lil. Other than the obvious, manual valve body, deep pan, etc. What do I need to make this thing live? It will get beat on as we bracket race... A LOT! LOL! Does it have the same input and or output shafts as the TH350? I have a good ATI converter for my old TH350 I'm hoping to reuse?? Also do I need a different yolk?? Mounting points?? Thanks in advance!

GUMP · 06-01-2020, 03:57 PM

I highly recommend Turbo Action. I have had a few different brands that didn't do so well.

You will need another converter. The mounts, driveshaft, and shifter will work. The tail housing has metric threads for the mount, so you will need new bolts.

ss3011 · 06-01-2020, 04:16 PM

If you get the rebuild through Scott McClay , he has an option to get you a 350/400 turbine shaft , and revised pump . That way you can use your current converter .

Bob Don · 06-01-2020, 05:24 PM

Get a J.W. Performance Ultra Bell. I cracked two cases before getting one. The case is the weak link on a TH200

https://racewithjw.com/product/ultra...-metric-to-gm/

Mark Yacavone · 06-01-2020, 06:18 PM

If you don't go with the 350/400 changeover option, you still want to get a hardened stator support shaft insert.

B Parker · 06-01-2020, 08:26 PM

Real simple Sepanek Racing Transmissions. I have 75 runs on his metric in a Big Block Chevy stocker. It's a 1970 402/375 hp making 635 hp. It's the fastest trany I've had in my car and it has lasted. BP

Lee Valentine · 06-02-2020, 05:21 AM

Sepanek all the way,best and fastest out there

KennyAnderson · 06-02-2020, 07:32 AM

Thanks guys and keep em coming! I've been told the Metric 200 is about a tenth faster than a TH350. Hoping this is true??? I would hate to leave that on the table but I'm wrestling with the durability of the 350.

GUMP · 06-02-2020, 08:20 AM

A good one will be fine behind an LT1. It will also be a little faster.

Alan Nyhus · 06-02-2020, 08:35 AM

Billy Lynn does also a great Metric 200. If you've got a TH350/400 convertor, you can have a input for those installed along with the appropriate pump mods. The governor driven auto 1-2 makes them very consistent. The JW bell housings are a worthwhile addition or you can fabricate a brace for the stock case. Also, the Lokar flexible dipstick makes life a lot easier. The marks on the Lokar unit aren't correct so you need to remark it relative to the oil pan flange on the case. Retapping the oil pan holes to 1/4X20 from the metric size is another thing to do to simplify things. If you elect to have a roller rear bearing installed in place of the bronze one, the drive shaft yoke will likely need to be turned down about .020 for proper fit.

For what it's worth. -Al

Billy Lynn (501) 278-0651

06-01-2020, 03:46 PM	#1
KennyAnderson Member Join Date: Sep 2013 Posts: 242 Likes: 23 Liked 234 Times in 80 Posts	Metric 200 - What do I need to make one last Good Afternoon guys. It's time to start converting our 93 Z28 IHRA pure stock car over to be NHRA legal. Car is 90% ready it just needs a drivetrain. I already have a motor, next up is a tranny. Of course I had a good TH350 that I sold recently.....DOH! I also have a Metric 200 but it's bone stock. I have a few options for tranny builders but I wanted to pick your brains a lil. Other than the obvious, manual valve body, deep pan, etc. What do I need to make this thing live? It will get beat on as we bracket race... A LOT! LOL! Does it have the same input and or output shafts as the TH350? I have a good ATI converter for my old TH350 I'm hoping to reuse?? Also do I need a different yolk?? Mounting points?? Thanks in advance!

06-01-2020, 03:57 PM	#2
GUMP VIP Member Join Date: May 2002 Location: Shelby, NC Posts: 1,665 Likes: 1,707 Liked 1,732 Times in 418 Posts	Re: Metric 200 - What do I need to make one last I highly recommend Turbo Action. I have had a few different brands that didn't do so well. You will need another converter. The mounts, driveshaft, and shifter will work. The tail housing has metric threads for the mount, so you will need new bolts.

06-01-2020, 04:16 PM	#3
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 885 Likes: 63 Liked 221 Times in 102 Posts	Re: Metric 200 - What do I need to make one last If you get the rebuild through Scott McClay , he has an option to get you a 350/400 turbine shaft , and revised pump . That way you can use your current converter .

06-01-2020, 05:24 PM	#4
Bob Don VIP Member Join Date: Oct 2002 Location: Greater Boston Posts: 1,476 Likes: 980 Liked 778 Times in 175 Posts	Re: Metric 200 - What do I need to make one last Get a J.W. Performance Ultra Bell. I cracked two cases before getting one. The case is the weak link on a TH200 https://racewithjw.com/product/ultra...-metric-to-gm/ __________________ Bob Don 128 SS

06-01-2020, 06:18 PM	#5
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,414 Likes: 2,581 Liked 4,447 Times in 1,693 Posts	Re: Metric 200 - What do I need to make one last If you don't go with the 350/400 changeover option, you still want to get a hardened stator support shaft insert. __________________ We are lucky we don't get as much Government as we pay for..... Will Rogers

06-01-2020, 08:26 PM	#6
B Parker Senior Member Join Date: Sep 2009 Posts: 835 Likes: 921 Liked 2,314 Times in 455 Posts	Re: Metric 200 - What do I need to make one last Real simple Sepanek Racing Transmissions. I have 75 runs on his metric in a Big Block Chevy stocker. It's a 1970 402/375 hp making 635 hp. It's the fastest trany I've had in my car and it has lasted. BP

06-02-2020, 05:21 AM	#7
Lee Valentine Senior Member Join Date: May 2004 Location: Brookfield, CT Posts: 708 Likes: 13 Liked 322 Times in 68 Posts	Re: Metric 200 - What do I need to make one last Sepanek all the way,best and fastest out there __________________ Lee Valentine 1661 STK

06-02-2020, 07:32 AM	#8
KennyAnderson Member Join Date: Sep 2013 Posts: 242 Likes: 23 Liked 234 Times in 80 Posts	Re: Metric 200 - What do I need to make one last Thanks guys and keep em coming! I've been told the Metric 200 is about a tenth faster than a TH350. Hoping this is true??? I would hate to leave that on the table but I'm wrestling with the durability of the 350.

06-02-2020, 08:20 AM	#9
GUMP VIP Member Join Date: May 2002 Location: Shelby, NC Posts: 1,665 Likes: 1,707 Liked 1,732 Times in 418 Posts	Re: Metric 200 - What do I need to make one last A good one will be fine behind an LT1. It will also be a little faster.

06-02-2020, 08:35 AM	#10
Alan Nyhus VIP Member Join Date: Dec 2002 Location: Lower Dakota territory Posts: 1,166 Likes: 1,016 Liked 762 Times in 226 Posts	Re: Metric 200 - What do I need to make one last Billy Lynn does also a great Metric 200. If you've got a TH350/400 convertor, you can have a input for those installed along with the appropriate pump mods. The governor driven auto 1-2 makes them very consistent. The JW bell housings are a worthwhile addition or you can fabricate a brace for the stock case. Also, the Lokar flexible dipstick makes life a lot easier. The marks on the Lokar unit aren't correct so you need to remark it relative to the oil pan flange on the case. Retapping the oil pan holes to 1/4X20 from the metric size is another thing to do to simplify things. If you elect to have a roller rear bearing installed in place of the bronze one, the drive shaft yoke will likely need to be turned down about .020 for proper fit. For what it's worth. -Al Billy Lynn (501) 278-0651 __________________ "That'll never work....."