M200 breakage

Grant Eldridge · 04-12-2010, 11:07 PM

Dave,
I had several case failures with my TH-200, fortunately caught before catastrophe struck. I tried to buy a brace from McClay, but he only supports his own transmission customers, or at least did at that time. I built my own brace connecting the two "eyes" on the passenger side of the trans with 1/2" thick by about 1" wide aluminum. I tried to upload a photo but the file is too big. Email me at grant4060@yahoo.com if you'd like a few photos. I also bought an aluminum deep pan from Turbo-Action to act as a girdle and give more strength to the case. I run this behind a big block stocker, 3570 lbs. with best of 1.41 60' and since the changes have had no further troubles. The transmission is a reverse pattern unit built by Jim Mantle, who is the greatest guy to deal with, and his units have always performed perfectly. Ditto on using the stock rear mount, also would suggest the left front torque strap from earlier posts. Make sure there is enough spline depth in your driveshaft yolk so that it cannot bottom out when the car launches and the rear end pushes it ahead. Hope this helps,
Grant

04-12-2010, 11:07 PM	#11
Grant Eldridge Member Join Date: Jul 2007 Posts: 124 Likes: 0 Liked 0 Times in 0 Posts	Re: M200 breakage Dave, I had several case failures with my TH-200, fortunately caught before catastrophe struck. I tried to buy a brace from McClay, but he only supports his own transmission customers, or at least did at that time. I built my own brace connecting the two "eyes" on the passenger side of the trans with 1/2" thick by about 1" wide aluminum. I tried to upload a photo but the file is too big. Email me at grant4060@yahoo.com if you'd like a few photos. I also bought an aluminum deep pan from Turbo-Action to act as a girdle and give more strength to the case. I run this behind a big block stocker, 3570 lbs. with best of 1.41 60' and since the changes have had no further troubles. The transmission is a reverse pattern unit built by Jim Mantle, who is the greatest guy to deal with, and his units have always performed perfectly. Ditto on using the stock rear mount, also would suggest the left front torque strap from earlier posts. Make sure there is enough spline depth in your driveshaft yolk so that it cannot bottom out when the car launches and the rear end pushes it ahead. Hope this helps, Grant