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  1. B

    Building the sub-assemblies for my first DIY TH400 trans: just completed the Sonnax Smart-Tech Drum module, (lots of photos).

    Nope. I had the body removed, the frame sand blasted and painted, and all new factory replacement rubber body bushings installed by the body shop. And BTW, the frame was in fantastic shape. I thought there would be a good chance that after they completed the sand blasting, it would reveal empty...
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    Building the sub-assemblies for my first DIY TH400 trans: just completed the Sonnax Smart-Tech Drum module, (lots of photos).

    I didn't know you have a first gen Camaro. I luv those cars. I never had one but a good friend of mine did when we were teens, and I was privileged to many spirited joy rides in it, and with the 4.88 rear gears he had in it, and the 1965 425 HP 396 Vette engine he had in it, that car really...
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    Building the sub-assemblies for my first DIY TH400 trans: just completed the Sonnax Smart-Tech Drum module, (lots of photos).

    Rick, I decided on 3.73 rear gears for a couple reasons: 1st, when I had the first set of heads on the motor which I don't believe are quite as good as the heads I have now, it made 802 ft/lbs of torque@4,200rpm with 715 ft/lbs in by 3,000rpm. With a 4.75" stroke and a 4.6" bore, I really don't...
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    Building the sub-assemblies for my first DIY TH400 trans: just completed the Sonnax Smart-Tech Drum module, (lots of photos).

    The BBC I have should end up making approximately 875 HP@6,200 rpm naturally aspirated on 93 octane pump gas. It's a very heavy Chevelle, so I expect to run in the high 9's with it at the drag strip, launching off the trans brake with 29" tall bias-ply slicks, 373:1 rear gears and a spool.
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    Building the sub-assemblies for my first DIY TH400 trans: just completed the Sonnax Smart-Tech Drum module, (lots of photos).

    Thanks for your interest guys. This is one of many learning experiences I've had with my Chevelle. I'm sure that at least many of you can relate in one way or another. So far I'm liking this. What I plan to do when I'm done building this TH400 trans is to take it to a local trans shop which has...
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    Building the sub-assemblies for my first DIY TH400 trans: just completed the Sonnax Smart-Tech Drum module, (lots of photos).

    John, I really didn't spend a whole lot of $$ on specialty tools. The cheap transmission clutch press I bought was only $38. The big dollars I spent was for the go-fast hi-perf transmission parts, as well as for the new race approved transmission case. But that's a matter of choice and...
  7. B

    Building the sub-assemblies for my first DIY TH400 trans: just completed the Sonnax Smart-Tech Drum module, (lots of photos).

    Hahahaha.....trans awareness, eh? What a world we live in.
  8. B

    Building the sub-assemblies for my first DIY TH400 trans: just completed the Sonnax Smart-Tech Drum module, (lots of photos).

    The last and final touches....
  9. B

    Building the sub-assemblies for my first DIY TH400 trans: just completed the Sonnax Smart-Tech Drum module, (lots of photos).

    More........
  10. B

    Building the sub-assemblies for my first DIY TH400 trans: just completed the Sonnax Smart-Tech Drum module, (lots of photos).

    In that last post above^^^ it shows the cheap Amazon transmission clutch press I bought, which wasn't really up to the task of pressing the heavier/stiffer clutch springs that drag racing applications typically use. In fact the whole press structure was flexing, and it wouldn't press the...
  11. B

    Building the sub-assemblies for my first DIY TH400 trans: just completed the Sonnax Smart-Tech Drum module, (lots of photos).

    here's more.....
  12. B

    Building the sub-assemblies for my first DIY TH400 trans: just completed the Sonnax Smart-Tech Drum module, (lots of photos).

    For those of you who might be interested. Just thought I'd post some photos of the various parts of these TH400 drag racing internals that I've started on. This Sonnax Smart Tech drum is intended by the manufacture for drag race builds in the 500HP to 3,500 HP range, which do NOT use the...
  13. B

    Maybe not new, but new to me: Three mounting bolt mini-starters

    The funny thing is that while PowerMaster only includes two mounting bolts with this three bolt starter of theirs, at least they include shims which have the three holes....
  14. B

    Maybe not new, but new to me: Three mounting bolt mini-starters

    They only include two bolts with the starter, but I buy the ARP starter bolts anyway. Of course they only come with two bolts also, so two sets have to be purchased. It's been a long time since I used OE type starters since I'm always using big tube headers and big aftermarket oil pans, neither...
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    Maybe not new, but new to me: Three mounting bolt mini-starters

    I just bought one of these. I like the idea of a mini-starter actually using all three mounting holes of the engine block just like the OEM starters do. I'm sure it will keep the starter more stable during operation, and having some added bulk to aluminum mounting block can't be a bad thing...
  16. B

    Does this ring on a TH400/4L80 trans output planet carrier press-off?

    Yes, this reluctor ring that I removed is for computer controlled 4L80e transmissions for some type of modern electronic function which I think controls how the trans shifts or something of that nature. I'm building a TH400 but some parts between the two transmissions are interchangeable. This...
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    Does this ring on a TH400/4L80 trans output planet carrier press-off?

    I forgot to update this thread. I took a hammer and a 1/2" brass punch to this carrier and knocked the ring off. It came off fairly easy. Took me 2 or 3 minutes.
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    Avoiding mini-starer mounting woes:

    Well just keep in mind that it likely has nothing to do with what brand the starter bolts are, nor even OEM vs. aftermarket bolts. It's having the correct diameter that's important. You need to have bolts which fit as snug as possible into the aluminum mounting block of the starter itself...
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    Avoiding mini-starer mounting woes:

    If you choose to use a mini starter, don't just assume that any starter bolts that are listed for your car will be ok to use, even if they're the proper length(s). Remember this is an aftermarket part you're dealing with, and I can tell you that the hole size diameter in the aluminum mounting...
  20. B

    Does this ring on a TH400/4L80 trans output planet carrier press-off?

    Yes that's why I was hesitant to tackle this for the first time. But I've done a whole lot of homework, and I think I'm gonna give it a shot. It's definitely not something that I would take lightly and just wing-it. But that wasn't the case when I did my first two ring & pinion gear swaps...
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