The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 3 speed to TH350 swap

raycow · 11-22-2010, 03:11 PM

All else being equal, I would always go for an overdrive transmission on any vehicle that gets driven at highway speeds.

Yes, the 700R4 will bolt up to your 250. It will be slightly more difficult to install than the TH350. You will need to shorten your driveshaft, cobble the TV cable mount and wire the converter lockup. I'm not mentioning the radiator, cooling lines, crossmember, and shift linkage because you will have to do those with the TH350 too.

Ray

11-22-2010, 03:11 PM	#2
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: 3 speed to TH350 swap - right choice? All else being equal, I would always go for an overdrive transmission on any vehicle that gets driven at highway speeds. Yes, the 700R4 will bolt up to your 250. It will be slightly more difficult to install than the TH350. You will need to shorten your driveshaft, cobble the TV cable mount and wire the converter lockup. I'm not mentioning the radiator, cooling lines, crossmember, and shift linkage because you will have to do those with the TH350 too. Ray __________________ Live more responsibly. Eat lower on the food chain. Eat vegetarians. Last edited by raycow; 11-22-2010 at 03:12 PM.