ok i have an opportunity to buy a built fd motor with upgraded twins and lots of other stuff to put into my gsl-se for a good price. how much power will the stock rear end setup hold, and if it wont hold enough what would i need to do for it to handle about 400 hp?



also, how difficult would it be to get the fd trans to line up in the fb? i dont know dimensions or anything but im sure someone here does. for mounting the motor ive always planned on doing the front subframe swap from the FC and then using the FD to FC mounting kit.



thanks

um i think basically the answer is, it depends.



there are people running 10's on the stock rear, i think you have to be nice to it, and then periodically check the axles, cause the stock ones bend. i think its moser that makes upgraded axles, and you could also brace the rear axle assembly, its fairly flexible.

ok but it should be able to handle 300 torque with upgrades? I was already planning to change the axles for the 5 lug ones i saw somewhere.



j9, do you know if the transmission would fit ok?

yep. fd trans should fit too, trans mount will be fun though

would the TII trans be a better way to go? from what ive read its stronger than the fd trans and fd guys even use them sometimes for high power. its also supposedly easier to mount, seems like that would be true since the fd uses that PPF. are those things true? if if the fd one isnt much harder to install i guess that would be a better way to go since i will be able to get it with the motor.



side question- does the ls1 fd swap use the fd trans?

the t2 trans is easier to mount. i guess its stronger too, but the car's light enough, and you're not making 500hp, so it kinda doesnt matter.



ls1 swap uses the ls1 trans

Are GSL rear ends similarly strong?

shane, let me know when you start getting after this project. i would be more then willing to give a hand with anything i could.

ok matt, you can hold my flashlight. no jk, i have to turn that thing into a roller before i can really get started on it. i need to start stripping it down, after all it is just sitting in the driveway and last time i tried it wouldnt start. that motor does have 240k miles on it though!





oh and i think the gsl has the same rear end. is it an lsd?

its basically the same, except the bolt pattern. except the 79-83 cars have smaller axles

haha ill hold more then just your flashlight big boy...



seriouly though, if you want to start stripping it down this weekend give me a call, ive got no plans for the weekend.

Dont use the stocker. Dropp that mother fucker like it's hott! I had a half bridge 12a and I use to go through ring and pinions like nothing. Granted I rompmy **** hard, but thats what its all about. Go 9" or 8.8" yeah its heavier but u will be able to launch as hard as u want and smoke evry body https://www.nopistons.com/forums/pub...1047683329.gif Tranny wise I believe u said the engine and trans is a package? If so sell the fd trans use the chips to score a TII. I don't know for sure wich is stronger but all u have to do to make it fit is swap your 12A tail housing with the TII and bam no cuttin hackig or welding. Use the 12a cross member and driv it like you stole it https://www.nopistons.com/forums/pub...1047683473.gif Final thought I have bin told by my elders that its possible to shorten the shift rods and make 3rd gear so easy to find your mom could not miss or any other noob hehehe. let us know how it goes, oh and pics.....

hey bigboi, thanks for the info. my car is a gslse. what model is your fb?

im using a t2 tranny it hold good also im using a gsl se diff on my 79 i have replace 3 diff but im running 150hp on NOS plus my engine is street ported with 600 holley, msd ign and RB headers so i probably in the 300 to 350 HP mark

well i broke the axle after my t2 swap ported....

i had a gslse rear i dint want to be changing axles and i put a ford 8.8 on it im happy with that

ok thanks you guys. great info.

Then I had an 82 base but I installed a 84-85 disk rear. I broke the 3.90 and the se gears 4.09 or 4.07 or 4.11 what ever they all suck if u like to romp your ****. Now I own a beautiful 85 5 letter. This car is bone stock with 105k on it now it had 98 when I bought it. The power stearing is the only thing that dsent work. I don't know if I should fix it or swap for a manual rack. this is the first 13B car I have had since I had my drop top in 01. viva la dose-a or how bout this, fierbre dose-a https://www.nopistons.com/forums/pub...1047683785.gif my spanish sucks. Basically shane I'm a 12A man. In Hip-hop tody they all talk about old as cadilacks on 22" or what ever. That aint gangsta, gangsta is an FB with cut springs rollin on 13" with them 205-50-13 and a 12A under the hood going brap brap brap. I dont know where the **** that came from but I had to say it. https://www.nopistons.com/forums/pub...1047683621.gif

1st gen is only a 7" ring gear.

yep first gens are 7" gears i personally have a ford 7.5 with ford racing lsd and mosser axels , my brother has same set up and his running 8.73 on his fb lunging all the time.

The rear end really depends on how hard you are on it. I would save the cash and give the rear end a chance, but that many ponys will rip tha 12A tranny apart!!



I know the turbo trannsmissions have one extra spline on the input shaft. I learned that the hard way! If your going to put a engine that has a turbo E-shaft in it you will need a turbo transmission.

you can pick a nice rear ford 8.8 or 9 from granyspeed.com for about 2500 without breaks or you can buy mine complete rear end 7.5 brand new mosser axels brand new for racing lsd brand new for racing yoke brand new custom bear breaks and much more im asking 2k including shipping. zero miles on it.