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Thread: Rear End change

  1. #16
    Administrator Evolution1980's Avatar
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    Quote Originally Posted by Rebelrob View Post
    Good to know. Thanks for the info.
    I think you were the one telling me also about your exhaust.
    I wish I could see a picture of somebodys 80-82 underneath with true dual exhaust.
    All ya gotta do is learn to effectively use the search functionality of the site!

    Here
    and Here
    and a little bit Here

    ...all I did was search for posts by me with the words dual exhaust pipe
    I also have some buried in my Flickr page of CAC stuff.


  2. #17
    Member Rebelrob's Avatar
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    Nice pics. Wow, I want those headers.
    I also want your 140 speedo, where did ya get it?

    I did not see that driver side cross member underneath your car. Maybe they were only on the 82. But it looks like you just ran yours straight back with no problems. I have heard the kits have a 90 degree bend in them to go by the passenger side. Or is the undercarriage on yours identical to an 82?
    Thx for all the info. Just read most of it.

    R

    Quote Originally Posted by Evolution1980 View Post
    All ya gotta do is learn to effectively use the search functionality of the site!

    Here
    and Here
    and a little bit Here

    ...all I did was search for posts by me with the words dual exhaust pipe
    I also have some buried in my Flickr page of CAC stuff.


  3. #18
    Administrator Evolution1980's Avatar
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    Quote Originally Posted by Rebelrob View Post
    Nice pics. Wow, I want those headers.
    I also want your 140 speedo, where did ya get it?
    Get the headers from Jet-Hot
    Get the speedo from Red Line Gauge. If a CAC'er has a speedo upgrade/conversion, it likely came from John.

    Quote Originally Posted by Rebelrob View Post
    I did not see that driver side cross member underneath your car. Maybe they were only on the 82. But it looks like you just ran yours straight back with no problems. I have heard the kits have a 90 degree bend in them to go by the passenger side. Or is the undercarriage on yours identical to an 82?
    "driver side crossmember"?
    I don't know why my underside would be any different than an '82.

    Yep, essentially ran them straight back without a problem. In fact, it was one of the easiest things done to my car.

  4. #19
    Member Rebelrob's Avatar
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    I will take a pic and post it tomorrow.
    thanks.
    R

  5. #20
    Member Rebelrob's Avatar
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    Ok your looking at the underneath driver side looking back towards the rear of the car. See that crossmember and the driver side exhaust pipe has to make a 90 degree bend to go around it on the passenger side. From what I could tell on your pics, you do not have this. You ran your driver side pipe straight back.... or am I missing something here....???



    Quote Originally Posted by Evolution1980 View Post
    Get the headers from Jet-Hot
    Get the speedo from Red Line Gauge. If a CAC'er has a speedo upgrade/conversion, it likely came from John.

    "driver side crossmember"?
    I don't know why my underside would be any different than an '82.

    Yep, essentially ran them straight back without a problem. In fact, it was one of the easiest things done to my car.

  6. #21
    Administrator Evolution1980's Avatar
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    Nope, I don't have that. Hell, from that picture, I can barely even visualize where it's at on your car!
    If anything, it looks like my original trans crossmember.

  7. #22
    Member Rebelrob's Avatar
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    I know they make true dual exhaust kits that make the bend for ya, but Im sure a custom muffler/exhaust shop can bend them the way you need them as well.
    So you dont have this huh. Wonder if anybody can confirm if the undercarriage is different on 82 vs 80/81's.
    The crossmember basically runs right behind the driver seat. That pics is the underneath of the drivers seat looking to the back.



    Quote Originally Posted by Evolution1980 View Post
    Nope, I don't have that. Hell, from that picture, I can barely even visualize where it's at on your car!
    If anything, it looks like my original trans crossmember.

  8. #23
    Administrator Evolution1980's Avatar
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    Quote Originally Posted by Rebelrob View Post
    The crossmember basically runs right behind the driver seat. That pics is the underneath of the drivers seat looking to the back.
    It runs side-to-side or ???

  9. #24
    Member Rebelrob's Avatar
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    NO, it just runs half way and then stops....
    Thats why the current exhaust bends around it by the passenger side..


    Quote Originally Posted by Evolution1980 View Post
    It runs side-to-side or ???

  10. #25
    Member Art Jett's Avatar
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    If you decide to go with a 700R-4, I reccomend not using the Bowtie. I bought a stage 2 and put it behind my 383. After only 15000 miles, the converter came apart and took the trans with it. I took it to Phoenix transmission and they showed me the parts that came out of it. The servo was for a truck. The clutches were low performance. The sprag was used(they estimated more than 100K miles on it). I was never happy with the performance of it either. Phoenix built me a new 2500 stall converter and rebuilt the trans with high perf parts. Now, when it shifts into 2nd, if I'm going around a corner, it will make the car jump sideways about 3" or so. It just snaps into gear. No more soft shifts. Plus they gave me twice the warranty that Bowtie did. Just my $.02.

  11. #26
    Member Rebelrob's Avatar
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    Ok thanks. It has a 700r-4 already, but plan to have it rebuilt.

  12. #27
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    This is a good thread, I have the same concern with the stock drivetrain in my 1980 L82. Im planning on swapping in a 383 stroker...in particular a 383 from Blueprint engines that makes 405hp/440tq. I currently have the stock TH350, but will be replacing it with a built 700r4 because I need the OD, so the tranny isnt really a concern. My concern is my differential....I have a stock 1980 rearend rebuilt 2years ago with 3.70 gears.

    As far as going to a 5spd, I seriously considered that. I was looking at a complete kit from keisler-automotive.com. It came complete with a TKO-500 and every single thing needed to install, but I just cant spring that much cash for the tranny and motor lol.

    Evolution, would you really recommend the TH400 over the 700r4? I just want something strong that gives me good OD to make up for my 3.70s.

  13. #28
    Administrator Evolution1980's Avatar
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    Quote Originally Posted by 80VetteL82 View Post
    Evolution, would you really recommend the TH400 over the 700r4? I just want something strong that gives me good OD to make up for my 3.70s.
    First, if you are getting a bigger engine and will be doing mostly street driving and not at the drag strip (save for a maybe rare occasion), I'd get the 200R4 instead of the 700R4. Quite frankly, the 700R4 wasn't worth the assache in getting all the custom parts made to make it fit (crossmember, driveshaft, etc). The 200R4 will give you the same OD but it's a drop in trans. Only difference is the 700R4 has a taller first gear making it more aggressive. Since you already have 3.70's, the 200R4 would be a better fit, IMHO.

    Second, if you think you would really be happier with a stick shift, then keep your current trans and just save your pennies for another year or two. The current trans/rearend setup will (should) hold up just fine for a few more years or longer depending on how often you bury the throttle from a stop.
    With hindsight being 20/20, I really wish I had done the 5 or 6-spd conversion rather than go with the built up 700R4. But whatcha gonna do... I got anxious and bit the bullet rather than waiting an extra season or two. (It especially chaffed my ass when I had to pull the 700R4 after the front pump failed. The cost to R&R the trans was the monetary difference between it and a manual trans conversion )

  14. #29
    Member 80VetteL82's Avatar
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    So is the 2004R a good transmission? I remember hearing it had a good amount of problems and wasnt a solid tranny...although, who knows if that source was reliable. Yah, I would like a 5spd but I really cant wait...with 3.70s and the TH350 I really cant go anywhere with the car. Plus, itd probably be nicer to have an automatic for the strip. How much can the 2004R take as far as strip time? I mean, I wont be going very often, just every once and a while... but who knows... I actually just went for the first time like 2 weeks ago, but that was in my Cobalt SS turbo.

    Im just excited to start this whole swap. Ive had this car since I was 16 (Im 21 now), and I have been making plans for years and years. Now Im finally in the position where I think Im ready to take it on. Im going to start pulling the motor in a couple of weeks hopefully...

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    I've heard the same thing about 200r4. Her is a example. 2000 miles after the factor warrenty was up my 85 el camino the tranny dies in my driveway. GM wont touch it. I took it to a indendent trany guy he told me the 200s where junk and GM knew it. The car only had 52000 on it so he convinced me to overhaul it. The failure was the main pump vains. I did recover 2/3rds of the bill from GM through the BBB. Now my elkey has 140000 on the clock and the trany is wasted again. I might just have a lemon here but who knows. Bottom line, I am planning the 200r4 swap in my 81 just because its a direct swap out from the th350c. I'll just have to pick a very reliable trany builder. Last thought, I am pretty hard on stuff....

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