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post #1 of 11 Old 02-12-2008, 03:11 PM Thread Starter
drunkenrich
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brake fluid

what kind of brake fluid should i use on my stock 1980 cj 7? dot 3? 4?

Also, do i have power brakes on this? or the other kind? it's stock. thanks guys

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post #2 of 11 Old 02-12-2008, 03:17 PM
jatepper
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Well, likely you do not have PB. To tell if you have PB, look for a booster diaphram behind the master cylinder in the engine compartment and it would have a vacuum line to the manifold. Also, the lid for the MC should tell you what type to use, but I think it is DOT 3.

Good luck.

1986 CJ7 Laredo - Auto 14k miles
1985 CJ7 Renegade - Auto 33k miles
1982 CJ8 Scrambler - T5 T-SPD
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post #3 of 11 Old 02-12-2008, 03:25 PM
luckycheesehead
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Quote:
Originally Posted by drunkenrich View Post
what kind of brake fluid should i use on my stock 1980 cj 7? dot 3? 4?

Also, do i have power brakes on this? or the other kind? it's stock. thanks guys
Should be DOT 3...

Stock could have had power or manual brakes. Do you have a brake booster on your firewall behind the Master Cylinder?
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post #4 of 11 Old 02-12-2008, 03:51 PM Thread Starter
drunkenrich
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what does the brake booster look like? big round thing?
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post #5 of 11 Old 02-12-2008, 03:52 PM
JFM626
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you probably have Dot 3, however you may also have Dot 4. Dot 4 is compatible with Dot 3 it just has a higher boiling point. Do not use Dot 5 which is silicone based and not compatible with the glycol based fluids.
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post #6 of 11 Old 02-12-2008, 08:12 PM
HighCountry
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I have only purchased DOT 4 for that last 15 years. It has a slightly higher boiling point which is needed if you go to Altitudes and as a bonus it does not absorb water vapor as quickly as the DOT 3. There is not downside to going with the 4 and a couple of ups, so why not.

Bruce
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post #7 of 11 Old 02-12-2008, 10:11 PM
John N
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DOT 3 is will work fine. DOT 4 will do well as said above, plus it won't remove paint when it spills or leaks.

'81 Scrambler w/ FI 360 AMC, 33x12.50 BFG M/T's, 5" of lift, ARB'd Dana 44's F & R, Dana 300 clocked & twin sticked w/4:1, Warn XD9000i, etc...
2002 Grand Cherokee Limited, 2008 Overland Grand Cherokee, a 1976 CJ-7 in pieces and 3 more off-brand 4x4s...............
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post #8 of 11 Old 02-12-2008, 10:41 PM
JFM626
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[QUOTE= DOT 4 will do well as said above, plus it won't remove paint when it spills or leaks.[/QUOTE]

Are you sure about that?
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post #9 of 11 Old 02-13-2008, 10:06 AM
John N
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Quote:
Originally Posted by JFM626 View Post
Are you sure about that?
I haven't tried it myself, but have been told it more than once by good sources. Anyone on here know first hand?

'81 Scrambler w/ FI 360 AMC, 33x12.50 BFG M/T's, 5" of lift, ARB'd Dana 44's F & R, Dana 300 clocked & twin sticked w/4:1, Warn XD9000i, etc...
2002 Grand Cherokee Limited, 2008 Overland Grand Cherokee, a 1976 CJ-7 in pieces and 3 more off-brand 4x4s...............
John N
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post #10 of 11 Old 02-14-2008, 09:58 PM
dimichele
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Originally Posted by HighCountry View Post
There is not downside to going with the 4 and a couple of ups, so why not.
It cost 3x as much.
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post #11 of 11 Old 02-14-2008, 10:35 PM
Fjguercio
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This is a picture of power brakes
Regards,
Fred

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