Yup. I misread my source, SOR.
1976 - 1980 FJ40 Brake Booster Replacement List
- Thread starter Vae Victus
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Yup. I misread my source, SOR.
Living in the Past
SILVER Star
The switch to the dual diaphragm booster was part of the switch to disc brakes on the front axle with the 76 model (9/75?). It ended in 7/80 with start of the 81 model (8/80) which included a change in the rear axle to a single brake cylinder. Pretty sure the master cylinder changed at the same time as axle/booster changes.
I have an 8/75 with drum and a single style booster, but am in the process of doing the disk swap. What does the dual diaphragm accomplish? I was just planning on removing the residual valve on my master and adding a proportioning valve, but am wondering now what the dual diaphragm is all about.
Disc brakes require more clamping power than drums. A dual diaphragm booster gives you more power assist without requiring a larger diameter shell.
I know quite a few people have converted to disc brakes but still retain the original single diaphragm booster. From what I know it still works.
I have been looking for a booster for my '76 FJ40. What I've learned is that suddenly, in 2013, it is no longer possible to find readily available units that are rebuilt by the community at large, much less by the big remanufacturers. I have attempted therefore to revive this topic again, and to document, in one tidy place, what I've found out in the past 2 weeks looking for a '76 FJ40 Power Booster.
- Booster Dewey (repair place in Oregon Booster Dewey Power Brake Booster Exchange Inc.) cannot get diaphragms anymore either. He is done with the 76-80 rebuilds unless someone starts making the diaphrams again. He can do '71-'75. Might be an alternative if the bolt pattern is the same, though they are not dual diaphram(? fact check me here)
- There are a few remaining rebuilds out there, but they are around $400 and up at SOR and other sites. If you want original OEM, then you will have to pay.
Talked With Steve at Booster Dewey and they are no longer able to rebuild the boosters for the fj 60s and fj 62s 1980 to 1990 either; parts unobtainable
Lou
Production is on track for October delivery. However, the booster is not intended for FJ60 or FJ62.
Vae Victus
Posting more than I know
Living in the Past
SILVER Star
Curious I thought starting with 8/80 the 40 series shared the same brakes as the 60/62 series? Not sure of any changes in the front calibers but I know the rear brakes went from two wheel cylinders to just one. Is the booster fitment the problem? Another question would be if the booster works on the later 40 series why won't the later 40 series booster work on the 76-80 40 series?
I don't think the later 40 series booster is the same as the one for the 60/62 series. At least the part numbers are different.
8/80 to 84 FJ40 booster is 44610-60180.
8/80 to 86 FJ60 booster is 44610-60100, supposedly still available for a whopping $1459.57 list price.
Having said that, these boosters may very well be interchangeable. After all, people have fitted FJ60 boosters, FJ80 boosters, mini-truck boosters on the FJ40. The later 40 series booster may work on the earlier trucks; however, I don't see it as a viable option. For one thing, it is very rare. You are going from rare to very rare. Secondly, it is quite a bit thinner. You may have to alter the brake lines a bit.
I may end up not advertising my new booster for the 8/80 to 84 model years, since it is a very small market anyways. However, I don't see any reason why it would not work.
8/80 to 84 FJ40 booster is 44610-60180.
8/80 to 86 FJ60 booster is 44610-60100, supposedly still available for a whopping $1459.57 list price.
Having said that, these boosters may very well be interchangeable. After all, people have fitted FJ60 boosters, FJ80 boosters, mini-truck boosters on the FJ40. The later 40 series booster may work on the earlier trucks; however, I don't see it as a viable option. For one thing, it is very rare. You are going from rare to very rare. Secondly, it is quite a bit thinner. You may have to alter the brake lines a bit.
I may end up not advertising my new booster for the 8/80 to 84 model years, since it is a very small market anyways. However, I don't see any reason why it would not work.
FJ40 Brake Booster
Starting at: $150.00
There are 3 Different Year Frames that the Brake Booster made a change:
1970-1975 - Early style Single Diaphragm Brake Booster - This is easily updated to the later FJ40 Option. You can have this rebuilt for an additional 249.00
1976-1980 - Dual Diaphragm brake booster *VERY RARE* and easily updated to the later FJ40 Option. Sadly, there is no option for a rebuild on this item anymore.
1981-1984 - Single Diaphragm late model updated FJ40 Brake Booster - This is a great upgrade for the earlier models of FJ40 Land Cruisers. You can have this rebuilt for an additional 249.00
- Shipping Weight: 10lbs
- Manufactured by: USED PART
1 year Ext. warranty
1 Year Extended Warranty (Used Only) ( +$25.00 )
Rebuilt or Remanufactured
Rebuilt / Reman ( +$249.00 )
THIS IS FROM CRUISER.NET
There are 3 Different Year Frames that the Brake Booster made a change:
1970-1975 - Early style Single Diaphragm Brake Booster - This is easily updated to the later FJ40 Option. You can have this rebuilt for an additional 249.00
1976-1980 - Dual Diaphragm brake booster *VERY RARE* and easily updated to the later FJ40 Option. Sadly, there is no option for a rebuild on this item anymore.
1981-1984 - Single Diaphragm late model updated FJ40 Brake Booster - This is a great upgrade for the earlier models of FJ40 Land Cruisers. You can have this rebuilt for an additional 249.00
Vae Victus
Posting more than I know
I just did a front and rear disc brake conversion. I have a 72 tub/firewall. I went with the OEM booster (single diaphragm) and a 93 FzJ80 master cylinder. Initially it didn't work and I couldn't figure out why, so I put it on the bench and it worked perfectly.
I then did some serious measuring and figured out the output shaft of the booster was extending too far and depressing the master cylinder at rest. So I adjusted from the pedal side and then turned the output nut in, reinstalled it and everything worked.
Racer65 educated me a lot, though he probably doesn't realize it.
I just checked the Racer 65 website and all of the brake boosters are available, new, and the prices are not bad at all. Thanks to all who have posted information on this subject. My '79 non-USA 40 has power drum brakes and I want to convert to disc in the front.
Vae Victus
Posting more than I know
I need to take some measurements but I think this looks like a promising potential rebuild kit for the tandem/ dual diaphragm 1976-1980 booster:
www.powerbrakebooster.com
Bendix Gen 2 Rebuild Kit , 8.5 double | Power Brake Booster
Rebuild kit- Bendix Gen 2, 8.5 Double, includes all the seals, diaphragms, check valve, and assembly lube,
www.powerbrakebooster.com
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Vae Victus
Posting more than I know
- Thread starter
- #159
Nice to have some new options.
Just installed a city racer unit on my 82 and it will put you through the Winshield. Disc up front / drum rear with 35” tires. I am very pleased and would highly recommend . Great price too
