« previous next »
Pages: [1]   Go Down

Author Topic: 1985 C30 SM465 to TH700R4 conversion  (Read 3398 times)

Offline Fatmanz85

  • Newbie
  • Posts: 20
  • Old but Newbie
1985 C30 SM465 to TH700R4 conversion
« on: December 24, 2014, 07:27:32 am »
Hate to give up the stick shift, good power, but the clutch is no longer my friend...... bad knees and getting older, I find I need a automatic. I have a 1988 C2500 with a good TH700R4 in it,( good low mileage running gear just bad body). Has anyone done this swap before?
« Last Edit: December 24, 2014, 07:48:39 am by Fatmanz85 »
Logged
1985 C30 Crew Cab Silverado, 6.2L 3 speed granny

Offline Irish_Alley

  • Tim
  • Senior Member
  • ****
  • Posts: 13333
  • Family is not an important thing. It's everything.
Re: 1985 C30 SM465 to TH700R4 conversion
« Reply #1 on: December 24, 2014, 08:48:30 am »
i blew out my knee when i was 17 or so, when i drive my 79 (sm465) it bothers me and my knee starts shaking if i have to hold the clutch in long. so i feel your pain, im looking for the swap if i can find one ill post it
Logged
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline VileZambonie

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 19211
Re: 1985 C30 SM465 to TH700R4 conversion
« Reply #2 on: December 24, 2014, 09:22:53 am »
Pretty straight forward swap. See if your radiator is already setup for a transmission cooler. If you are making it column shift you'll need the linkage, column etc. Driveshaft length will be different.
Logged
,                           ___ 
                         /  _ _ _\_
              ⌠¯¯¯¯¯'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline roundhouse

  • Senior Member
  • ****
  • Posts: 1474
  • Newbie
Re: 1985 C30 SM465 to TH700R4 conversion
« Reply #3 on: December 24, 2014, 10:58:37 am »
A hydraulic clutch would be a lot less leg effort



Sent from my iPhone using Tapatalk
Logged

Offline zieg85

  • Global Moderator
  • Senior Member
  • ****
  • Posts: 7601
    • 73-87 GM squarebody extended cab and conversions up to 91 R/V series
Re: 1985 C30 SM465 to TH700R4 conversion
« Reply #4 on: December 24, 2014, 11:21:11 am »
Quote from: roundhouse on December 24, 2014, 10:58:37 am
A hydraulic clutch would be a lot less leg effort



Sent from my iPhone using Tapatalk

1985's are juice clutches
Logged
Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

Offline roundhouse

  • Senior Member
  • ****
  • Posts: 1474
  • Newbie
1985 C30 SM465 to TH700R4 conversion
« Reply #5 on: December 24, 2014, 10:38:20 pm »
Quote from: zieg85 on December 24, 2014, 11:21:11 am
Quote from: roundhouse on December 24, 2014, 10:58:37 am
A hydraulic clutch would be a lot less leg effort



Sent from my iPhone using Tapatalk

1985's are juice clutches
wonder if you could use a brake MC and a hydroboost or a vacuum booster
To reduce the pedal effort to almost zero ??

Alot of big trucks have a air assist on the clutch



Sent from my iPhone using Tapatalk
« Last Edit: December 27, 2014, 10:38:02 am by roundhouse »
Logged
Pages: [1]   Go Up
« previous next »