TRNW-2: 8HP75 are these rebuildable

Fri Jan 10 05:49:24 PST 2025

We haven’t seem enough of these to invest in building them. I think we have
only seen 4 failed units in the past 5 years or so. Used units are cheap
too. Anything dealer like tcm/vb is on  back order every time I check. That
means the ability to make a used tcm to work is important.

On Fri, Jan 10, 2025 at 8:40 AM Healy Powertrain via trnw2 <trnw2 at trnw.net>
wrote:

> You mean that lug that keeps the snap ring from spinning?  I wouldnt
> recommend grinding/modifying those things.  This whole gear train/drum
> assembly sees high rpm spin-up and -downs during shifts. It might cause a
> snapring coming off.  With the way it is designed it cant come off and only
> removeable with the tooling.
>
>
>
>
> On Friday, January 10, 2025 at 2:08:35 pm +01:00, pat schulte <
> zzyzxpat at gmail.com> wrote:
>
> Or you grind a taper on the little lug that allows you to remove the
> snapring normally.
>
> On Fri, Jan 10, 2025 at 4:47 AM Healy Powertrain via trnw2 <trnw2 at trnw.net>
> wrote:
>
> I forgot to mention this in my last post regarding this 8HP unit:
> There are 2 Special Tools necessary in order to remove 2 Snap Rings
> without damage.
> Here is an example from Adaptacase:
>
> https://adaptacase.com/t-3500ac.html
>
>
>
>
> On Friday, January 10, 2025 at 12:48:15 pm +01:00, Fred Whitaker via trnw2
> <trnw2 at trnw.net> wrote:
>
>      I work in a pretty low income area. And so far with these when I get
> one  that is "shot",used ones have been an obvious solution.  The price
> used ones go for they must not be super problematic. We keep the cores,but
> is seems anymore looking for parts in cores is a waste of time. So much
> stuff is traps and dead ends because this doesn't interchange with that!
>   Yes someone is fixing them. But I see no way right now how I could
> compete with prices used ones are going for.
>
> ------------------------------
>
> *From:* trnw2-bounces at trnw.net <trnw2-bounces at trnw.net> on behalf of
> Steve Everett via trnw2 <trnw2 at trnw.net>
> *Sent:* Thursday, January 9, 2025 7:07 AM
> *To:* Healy Powertrain <info at healypowertrain.com>; Technical Discussion
> Forum <trnw2 at trnw.net>
> *Subject:* Re: TRNW-2: 8HP75 are these rebuildable
>
>   I havent been into one of these yet, but I look at any new unit the same
> way,  someone put it together, someone is fixing them somewhere,  I'll give
> it a shot
>
> Steve
>
> On Thu, Jan 9, 2025 at 7:34 AM Healy Powertrain via trnw2 <trnw2 at trnw.net>
> wrote:
>
> Thats like saying no to a 700/4L60 in 1989...
>
> I believe its considered a non-serviceable unit by the OE, but its just
> like any other supposed to be "non-serviceabel" units that turned out to be
> very serviceable.
> Complete Gear Train is held by small clip behind rear seal.
> There is a seal thats difficult (riveted) to replace (D-Clutch). It has to
> be drilled and re-centered.  Transtec has a tool available, but you can
> make your own. Same clutch needs a Thicker Pressure Plate, so does Clutch A
> with the earlier units (Pre-2019). Those are available from Sonnax
> D-Clutch Shell Is always worn, check other alu hubs for same wear.
> Some Pre-2015/16 (not sure) need an updated Planet #3> Pinion washers
> changed from plastic to copper.
> Valvebody is similar to a 6HP.  Check for same wear patterns.
> Unfortunately TCM is not available seperately.
>
> Its odd that most parts places have not much available other than the
> basic OH/Seal, Friction/Steel kits.
> Eriksson Industries has more parts, or can at least get the correct parts.
> Have Fun!
>
> Best Regards,
>
> Marcel Verwijmeren
> Healy Powertrain
> Driveline Solutions
> T 06 57745407
> E info at healypowertrain.com
> W www.healypowertrain.com
>
>
> On Thursday, January 9, 2025 at 4:31:48 am +01:00, Richard Wardell via
> trnw2 <trnw2 at trnw.net> wrote:
>
> Save yourself the stress and just say no.....
>
> Richard Wardell
>
>
> On Wed, Jan 8, 2025, 1:04 PM Brett Karulak via trnw2 <trnw2 at trnw.net>
> wrote:
>
> Are these things rebuildable?  If so, what else is needed outside of TC,
> LS Kit, PanFilter, and any broken parts.  If it does need hard parts, are
> those available?  Units are on national back order from Dealer.  Anyone
> else sell these like Jasper or someone else?
>
> thank you,
> brett
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>
>
> --
> Pat Schulte
> AAMCO Transmissions
> Temecula, Ca.
>
>
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