TRNW-2: 700r4 aux v body --non aux v body

[Chris and Cathy Kershaw]

I think aux vb cases have big casting numbers on the side.

On Thu, Nov 6, 2025 at 10:33 AM Healy Powertrain via trnw2 <trnw2 at trnw.net>
wrote:

> These 4L60(E) unit are perfect for checking your memory functions, so many
> changes..pffff..I got a headache already reading all these posts...
> There is a Update handbook from ATSG that covers all those changes.
>
> I think you got a 1986 model trans:
> It should have:
> Small hole drum with checkball in drum (front)
> Smaller Diameter Steel piston without orifice
> Regular "Flat" wave plate.
>
> I think TG recommends another wave plate in between 2 frictions for
> smoother apply.
>
>
> Marcel Verwijmeren
> Healy Powertrain
> Driveline Solutions
> T 06 57745407
> E info at healypowertrain.com
> W www.healypowertrain.com
>
>
> On Thursday, November 6, 2025 at 3:59:15 pm +01:00, James Carter via trnw2
> <trnw2 at trnw.net> wrote:
>
> I believe that model should have at least one thick low /reverse steel
> plate and a cushion steel . you can apply air with the valvebody off and
> see how much travel you have .
> Also a good point on the reverse drum Richard .
> James
>
> On Thu, Nov 6, 2025 at 6:42 AM pat schulte via trnw2 <trnw2 at trnw.net>
> wrote:
>
> I agree Fred, I know I have done it many times. I would question the
> timing of the L/R clutch as well, you would want that on before the reverse
> input clutches applied ideally.
>
> On Thu, Nov 6, 2025 at 3:43 AM Fred Whitaker via trnw2 <trnw2 at trnw.net>
> wrote:
>
>  Iduno James  When these came out it was preached at seminars and tech
> magazines not to use a big hole drum with a big hole stator. But I think I
> have been getting away with it for years. As Bob Chernay used to say.
> "Never say never and never say always"  Not saying a small feed hole
> wouldn't fix it,and i don't know the answer. But I would do more digging
> for answers before pulling it out. As far as I remember you are right 87
> should have a aux valve body.  Did the case have the cup plug check ball
> capsule at the back for Low reverse? Not saying that is problem but a way
> to identify case.  Also 87 up case has a line in the casting on the outer
> case that kind of makes a loop between cooler line fittings
>
>
> ------------------------------
>
> *From:* trnw2-bounces at trnw.net <trnw2-bounces at trnw.net> on behalf of
> James Carter via trnw2 <trnw2 at trnw.net>
> *Sent:* Wednesday, November 5, 2025 4:13 PM
> *To:* preston farmer <ipz2222 at comcast.net>; Technical Discussion Forum <
> trnw2 at trnw.net>
> *Subject:* Re: TRNW-2: 700r4 aux v body --non aux v body
>
> Preston
> Probably a mismatch in the feed hole in the reverse drum to pump stator .
> If you have a big hole drum and a big hole stator with a moderate boost
> valve it will bump pretty good .
> I have changed to non auxiliary vbs before without a problem .
> James
>
> On Wed, Nov 5, 2025 at 4:03 PM preston farmer via trnw2 <trnw2 at trnw.net>
> wrote:
>
>
> I have  a 87 truck with the date code on the side of the trans as 7,,
> meaning 87. The trans has a non aux v body on it with non aux pump. Someone
> built the trans 15 years ago.My understanding  was that all 87's had aux v
> body. Vehicle had been sitting for years,, don't know if trans didn't last
> long after being built. It has extremely hard rev engagement now with 75
> psi pump pressure. Works good going fwd. Just wondering if the v body -
> case might be a problem and does anyone have pictures of any possible
> differences in the cases?
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>
>
> --
> Pat Schulte
> AAMCO Transmissions
> Temecula, Ca.
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