I Installed a new receiver on the ‘89 today.
I stole the old U-Haul unit for the ‘87 this winter. Decided the nicer rig should get the new receiver - boy did I underestimate how hard it would be to get one to AK!
I eventually got one with free shipping courtesy of Bezos. It’s for an ‘04 Tahoe, but it sure fits good! (Reese Towpower 44668)
The two pictured bumper bolts and two more holes in the frame lined up well. I drilled two more 1/2 holes in the frame, for a total of six out of eight bolts, which should be sufficient given the original unit only had four. The middle mounting holes landed right on some frame rivets, and I had no interest in drilling through them.
I grossly underestimated how hard it would be to drill the two holes in the frame. I used an almost new $20 cobalt bit, lots of cutting oil, predrilled my holes, and still burned through three 20V crapsmen batteries and an entire afternoon. (I hear a mag drill would’ve made this very easy)
I’m pretty happy with the results though! That’s a second gen tundra plug, connected to a homemade set of relays to adapt the 5 wire taillights to the American 4 wire system. (I’d be happy to make a post about it if there’s interest)
If anyone is following my footsteps, here’s the mounting hardware I needed.
2x M12 x 50 1.25 pitch bolts
4x M12 x 45 1.75 bolts (should’ve been a size shorter)
4x M12 flat washers, nuts and lock washers (should’ve used nylock nuts)
I also used the six large washer that came with the hitch for spacing the receiver below the frame rivets.
2nd Gen Tundra plug mounting
2x M7 x 30 1.00 bolts and lock washers
10x 1/4 washers for spacing the mounting bracket off the round bar.