Skip to main content
Stesso

Mate Transmission to Engine and Install Engine Mount Brackets

4:27
8:06
236 views

At 4:27 in

From Old to LS Power: 6.0 Swap in My 1977 Jeep J20 (Part 1)

Watch on YouTube

What happens here

Bolt the TH400 transmission to the LS engine. Note that when mating a TH400 to an LS engine, there will only be five bolt holes that align; this is normal and sufficient. Apply red Loctite to these M10x1.5x50 transmission bolts and torque them down to 37 ft-lbs. Next, install the engine mount brackets onto the sides of the engine. Ensure the brackets are oriented to go upwards when mounted. The narrator finds a gunked-up thread hole on one side, which he cleans and taps to allow the bolt to thread properly.

Goal: Attach transmission to engine and install engine-side mounts

Tools and materials

  • Impact Driver Milwaukee — Lightly running up bolts before final torqueing
  • LS Conversion Engine Mounts — The engine-side portion of the engine mounts
  • M10x1.5x50 Transmission Bolts — Securing the transmission to the engine
  • Red Loctite Loctite — Securing the transmission bolts and engine mount bolts
  • TH400 Transmission General Motors — The automatic transmission being mated to the LS engine
  • Thread Tap — Cleaning and re-tapping gunked-up threaded holes
  • Torque Wrench — Applying precise torque to the transmission and engine mount bolts

What they say

Hide

see how this goes. Here we got the TH400 bolted up to the 6.0. Now, when you're using the TH400, you're only going to have five bolts. This bolt right here is not going to go in. There's no hole here. And five bolts is more than enough. These are M10 by 1.5 by 50, I believe. Um they threaded right in there. Lock tight them. I'm going to go ahead and torque them down to 37 ft lbs right now, and then we'll go throw the engine mounts on the side there, and we'll be good to go. So, here's what our Here's what our plate looks like that gets mounted. It gets mounted with the same bolts as the bell housing did. It's all that metric cuz it's LS. So, I'm going to go ahead and mount these right on the side. Make sure you lock tight them before. Let it set up a little bit before you completely torque them down. But, I'm going to thread these in. My brackets go upwards like this when you put them on the engine. And they slide in like that. All right, so I had to go ahead and put a thread a tap in there. I just tapped it, cleaned it out. It was a little gunked up, probably from when they sprayed the block with paint. Probably some dried up paint on there or something, but seems to be going better now. I can actually get them threaded in there. So, I'm going to go ahead and take the impact and lightly run them up. Not too much. I don't want to All right, I got the transmission bolted to the engine. Transmission bolted to the engine. I got the engine mounts on. We're going to go ahead and we're going to try to drop it in the frame now.

Auto-generated from the video audio.