3 on the tree to sm465 conversion questions

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

AuroraGirl

Full Access Member
Joined
Sep 8, 2019
Posts
9,693
Reaction score
6,869
Location
Northern Wisconsin
First Name
Taylor
Truck Year
1978, 1980
Truck Model
K10, K25
Engine Size
400(?), 350
I am using new hardware. The old stuff that came off the crossmember was nasty and missing a bunch of pieces. I got all new bolts, nuts, and washers for the crossmember. I didn't get any bolts with the transmission so I got some grade 8 bolts like Bucket said earlier and they seemed to fit.
fit isnt the issue, the original bolts were longer on the crossmember to frame, and used a spacer on top of the bottom of the frame rail (with the bolt either going up or down into it, nut on the other side) because longer bolts are able to be tighter or something. Its only on the 4 crossmember to frame ones, the rest are fine
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
30,438
Reaction score
28,342
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
SPacers for the bolts, @bucket can tell you about them. are you using new hardware?

The 2wd crossmembers don't use that setup. There was a couple different designs, but they all used either extra bracing to the top of the rails and/or a side that wrapped up the side of the frame rail.
 

AuroraGirl

Full Access Member
Joined
Sep 8, 2019
Posts
9,693
Reaction score
6,869
Location
Northern Wisconsin
First Name
Taylor
Truck Year
1978, 1980
Truck Model
K10, K25
Engine Size
400(?), 350
The 2wd crossmembers don't use that setup. There was a couple different designs, but they all used either extra bracing to the top of the rails and/or a side that wrapped up the side of the frame rail.
So.. he should use the 4wd type setup because his crossmember lacks the extra part?
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
30,438
Reaction score
28,342
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
So.. he should use the 4wd type setup because his crossmember lacks the extra part?

No ma'am. From what I recall seeing in the picture, his crossmember is installed correctly, along with the brace on the one side. Besides that, the 4x4 crossmembers are not positioned correctly for a 2wd trans mount.

I'll try to get some pictures rounded up so you can better see how the 2wd stuff is set up.
 

Jamesz

Junior Member
Joined
Sep 12, 2024
Posts
25
Reaction score
20
Location
missouri
First Name
James
Truck Year
1977
Truck Model
c10
Engine Size
350
No ma'am. From what I recall seeing in the picture, his crossmember is installed correctly, along with the brace on the one side. Besides that, the 4x4 crossmembers are not positioned correctly for a 2wd trans mount.

I'll try to get some pictures rounded up so you can better see how the 2wd stuff is set up.
I took some pictures of it today so I could make sure we were thinking about the same thing. So is this what yall are kind of talking about as far as mounting positions? I put it back it the same as it came out so I didn't think anything should have been different.
 

Attachments

  • 20241031_160001.jpg
    20241031_160001.jpg
    111.3 KB · Views: 11
  • 20241031_160009.jpg
    20241031_160009.jpg
    85 KB · Views: 11

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
30,438
Reaction score
28,342
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
I took some pictures of it today so I could make sure we were thinking about the same thing. So is this what yall are kind of talking about as far as mounting positions? I put it back it the same as it came out so I didn't think anything should have been different.

Yep, that's all good there.
 

Jamesz

Junior Member
Joined
Sep 12, 2024
Posts
25
Reaction score
20
Location
missouri
First Name
James
Truck Year
1977
Truck Model
c10
Engine Size
350
You must be registered for see images attach
You must be registered for see images attach
update. I filled the transmission last night to come into about 2 quarts on the floor this afternoon. And it's coming from the front of the trans. Probably going to blow this thing up if one more thing goes wrong lol.
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
30,438
Reaction score
28,342
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
You must be registered for see images attach
You must be registered for see images attach
update. I filled the transmission last night to come into about 2 quarts on the floor this afternoon. And it's coming from the front of the trans. Probably going to blow this thing up if one more thing goes wrong lol.


Hmm. You seem to have a leak there.


Lol, sorry I couldn't resist. That's a decent leak too. Bananas and saw dust can't even fix that.
 

Jamesz

Junior Member
Joined
Sep 12, 2024
Posts
25
Reaction score
20
Location
missouri
First Name
James
Truck Year
1977
Truck Model
c10
Engine Size
350
Hmm. You seem to have a leak there.


Lol, sorry I couldn't resist. That's a decent leak too. Bananas and saw dust can't even fix that.
Yeah this is getting ridiculous XD
 

Forum statistics

Threads
44,156
Posts
950,548
Members
36,268
Latest member
JUKA
Top