TRNW-2: 6R80, rebuild minimums

[J V]

thx Dan. it's a gen 2


On Wed, Oct 15, 2025 at 6:09 PM Dan Hogan via trnw2 <trnw2 at trnw.net> wrote:

> John,
>
> Varies with generation.  What year are you working on?
>
> All gens
>
> I agree with Chris.  BW or OE frictions appear to be best on these units.
> Overhaul kits are competitive from the dealer as well last we purchased.  I
> think the part numbers on on the TRNW site.
>
> E Clutch (456)
>
> Inspect/replace the rear bushing in the stator support tube that supports
> the E clutch drum up front as it seals the circuit here.  The A clutch drum
> (456) is also prone to crack/leak so check closely.  High mileage would be
> smart to replace with new.
>
> Rear planet
>
> Spline wear where the 456 hub connect is common especially on the fullsize
> Transit applications.  Gearsets are not cheap.
>
> Gen 2
>
> VBs we used to source new units from Ford, but as others on group state
> pricing is getting high.  We don't see a ton of wear, but solenoids are
> hit/miss.  I'd prefer a new set, but again pricing and availabiliy isnt
> great.  Check leadframe on valvebody and replace if not updated.  Ford did
> issue a PCM update to reprogram shift schedule to prevent high speed
> downshifts when the OSS fails.
>
> Gen 1 (internal TCM)
>
> We have seen internal TCM failures and solenoid failure rates appear
> higher on the 1st gen.  I think the last one we did the complete VB/TCM
> (mechatronics) was > $1000 from the dealer.
>
> I like the Transgo kits here in this both applications.  Sonnax here not
> so much.
>
> ---
>
>
> Dan Hogan
>
> Buster's Transmission Service
>
> https://busterstransmission.com
>
> 704.847.5321
> ------------------------------
> *From:* trnw2-bounces at trnw.net <trnw2-bounces at trnw.net> on behalf of John
> Vanklavern via trnw2 <trnw2 at trnw.net>
> *Sent:* Wednesday, October 15, 2025 6:21 AM
> *To:* trnw2 at trnw.net <trnw2 at trnw.net>
> *Subject:* TRNW-2: 6R80, rebuild minimums
>
> *Date:* Wed Oct 15 3:21:57 PDT 2025
> *Subject:* 6R80, rebuild minimums
>
> doing my first 6r80. I'm hearing a lot people say replace vb with oe. Are
> the vb kits not worth a crap. This trans only had tcc shudder, no codes.
> 200k, looks like original fluid. just tearing into it. pan very clean for
> mileage and no maintenance. Also hearing only borg clutches in 456. ANy
> other 6r80 experience greatly appreciated. Thank you
>
> John Vanklavern
> Jvk Services Llc
> West Olive, Michigan USA
> TRNW Member Since: 5/23/2025
>
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