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Rob Petrie E395 · 02-19-2014, 11:09 PM

Is it a NV3500 5 speed transmission? Aluminum case and looks like it splits in two. If so they put those in alot of 1 tons and they seemed to hold up just fine. Back then I went to GM training on them and have only had to work on 1 since then. Before that they had I believe 245 and 265 4 speeds in them which are both easier to work on and a little stronger. But either will work if you can source all the parts to put them in. Be aware if its a NV3550 the input shaft and output shaft are different as they were the same transmission but made for Dodge trucks. If you currently have a TH400 with the lockup torque converter I would stay with it. I dont think you will gain much by switching especially if you do mostly local stuff.

02-19-2014, 11:09 PM	#4
Rob Petrie E395 VIP Member Join Date: Dec 2007 Location: Woodlawn IL Posts: 1,092 Likes: 162 Liked 216 Times in 77 Posts	Re: std. trans for towing? Is it a NV3500 5 speed transmission? Aluminum case and looks like it splits in two. If so they put those in alot of 1 tons and they seemed to hold up just fine. Back then I went to GM training on them and have only had to work on 1 since then. Before that they had I believe 245 and 265 4 speeds in them which are both easier to work on and a little stronger. But either will work if you can source all the parts to put them in. Be aware if its a NV3550 the input shaft and output shaft are different as they were the same transmission but made for Dodge trucks. If you currently have a TH400 with the lockup torque converter I would stay with it. I dont think you will gain much by switching especially if you do mostly local stuff.