700R4 Oil Cooler Lines
#1
Junior Member
Thread Starter
Join Date: Feb 2009
Posts: 4
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1990 IROC
Engine: 305
Transmission: 700R4
700R4 Oil Cooler Lines
I am working on my first car rebuild of a 1990 5.0 IROC and during the engine pull the hard transmission lines from the 700R4 to the factory transmission oil cooler were destroyed. The really bad part is the ends were lost and I don’t know what the sizes were. Can someone help me with proper size from these lines? I have searched at NAPA and other part stores to just replace the hard lines but can’t seem to find them. So I am figuring my choices are nipples and rubber hose or adapters and AN fittings.
#2
Moderator
Join Date: Jul 1999
Location: 51°N 114°W, 3500'
Posts: 17,120
Likes: 0
Received 123 Likes
on
104 Posts
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: 700R4 Oil Cooler Lines
1/4" brake lines. Might be 5/16" but I'm not sure if that's a common size so it's more likely 1/4". Tranny and brake line fittings are the same.
#3
Banned
iTrader: (12)
Join Date: Jul 1999
Location: Bertram (outside Austin), TX
Posts: 12,212
Likes: 0
Received 10 Likes
on
10 Posts
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: 700R4 Oil Cooler Lines
Repros JUST came out
Contact toxik IROC. I know he bought a repro set, but can't use it now, and wants to sell.
Contact toxik IROC. I know he bought a repro set, but can't use it now, and wants to sell.
#5
Moderator
Join Date: Jul 1999
Location: 51°N 114°W, 3500'
Posts: 17,120
Likes: 0
Received 123 Likes
on
104 Posts
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: 700R4 Oil Cooler Lines
I have short extension lines coming off my tranny mainly because with a tranny shield, the fittings are hard to access. I have 3/8" steel braided hose slipped over the short sections of hard line. I guess from that assumption, the cooler lines are probably 3/8" hard lines. Although I mentioned smaller lines, I wouldn't want to run such a small cooler line.
You need to use a 1/2" wrench to remove the fittings so the hard lines are probably 3/8".
You need to use a 1/2" wrench to remove the fittings so the hard lines are probably 3/8".
#6
Member
Join Date: Nov 2008
Location: sacramento california
Posts: 356
Likes: 0
Received 0 Likes
on
0 Posts
Car: 64chevelle/smokey trans am
Engine: 350 p600 pro charger/350
Transmission: 350/700r4
Axle/Gears: 3.36
Re: 700R4 Oil Cooler Lines
transmission cooler lines are 5/16" for 700r4's. Use solid lines only. You can make rubber connections at the radiator or auxiliary cooler if needed as long as you use high pressure transmission cooler line. It is different than fuel line or evap line. Keep in mind that transmission fluid is extremely flammable and can burn your car to the ground/no joke.
#7
Moderator
Join Date: Jul 1999
Location: 51°N 114°W, 3500'
Posts: 17,120
Likes: 0
Received 123 Likes
on
104 Posts
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: 700R4 Oil Cooler Lines
Transmission rubber line will have "transmission" written on the lines.
Trending Topics
#9
2011 Norwood Gathering
ThirdGen Camaro Rep
ThirdGen Camaro Rep
iTrader: (5)
Join Date: Mar 2008
Location: MICH.
Posts: 200
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 IROC
Engine: 5.7
Transmission: 700R4
Axle/Gears: 9 bolt 2:77
Re: 700R4 Oil Cooler Lines
inline tube in Shelby MI. sells them. just do a search and they should show up.
#10
Junior Member
Join Date: Apr 2009
Location: Yulee, FL
Posts: 17
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1984 Camaro
Engine: 5.0 Liter (305 ci)
Transmission: 700R4 Automatic
Axle/Gears: 3.23
Re: 700R4 Oil Cooler Lines
I had to replace the lines also and purchased two 5/16" steel brake lines that were 60" long. They come with the proper fittings at both ends. Please try to prebend and install prior to putting the engine and transmission back in the car. These were very hard to install once the engine and tranny were in the car. Get a tubing bender also so you don't kink the tubing. The two tubes and bender cost $25 at Advance Discount Auto Parts.
#11
Junior Member
Thread Starter
Join Date: Feb 2009
Posts: 4
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1990 IROC
Engine: 305
Transmission: 700R4
Re: 700R4 Oil Cooler Lines
Thanks for the information on Inline tube. I have an email to them to see if they have the part; it didn't show on their website. If not I guess its time to bend tubes. Unfortunately the engine and transmission are in the car. Well it’s not the first time I had to pull the engine half way back out of the car. I made that mistake when I decided to put long tube headers on the car after the engine was back in the car after the rebuild. As I said it’s my first rebuild. I know I will make a few mistakes but that’s half the fun is figuring it out.
#12
Junior Member
Thread Starter
Join Date: Feb 2009
Posts: 4
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1990 IROC
Engine: 305
Transmission: 700R4
Re: 700R4 Oil Cooler Lines
Just as an update for anyone who may have these same issues later. I went with the bend new lines option. Yes, the lines are 5/16 brake line. If you haven't worked with bending your own lines before remember that aligning the entry into the fitting on the trans and radiator is critical. We fought for hours to try and get both ends lined up correctly and start the threads into the fittings. The best idea that I had that I could give someone else who goes this route is we decided to cut the lines in half and use unions in the middle. This made the connections much easier then we only had to fight the alignment issues one end at a time and the shorter line was much easier to work with.
#13
Junior Member
iTrader: (-1)
Join Date: Mar 2011
Location: North Carolina
Posts: 69
Likes: 0
Received 0 Likes
on
0 Posts
Car: 85 trans am
Engine: 5.0 carbed
Transmission: TH700R4
Axle/Gears: 9 bolt
Re: 700R4 Oil Cooler Lines
Just as an update for anyone who may have these same issues later. I went with the bend new lines option. Yes, the lines are 5/16 brake line. If you haven't worked with bending your own lines before remember that aligning the entry into the fitting on the trans and radiator is critical. We fought for hours to try and get both ends lined up correctly and start the threads into the fittings. The best idea that I had that I could give someone else who goes this route is we decided to cut the lines in half and use unions in the middle. This made the connections much easier then we only had to fight the alignment issues one end at a time and the shorter line was much easier to work with.
Thread
Thread Starter
Forum
Replies
Last Post
toronto formula
Engine/Drivetrain/Suspension Parts for Sale
15
11-10-2015 06:17 AM
Navy8125
Engine/Drivetrain/Suspension Parts for Sale
4
08-21-2015 09:32 AM