TRNW-2: 6R80, rebuild minimums

[J V]

does anyone know why all of the responses to this aren't showing up on the
trnw website?


On Thu, Oct 16, 2025 at 6:34 AM J V <jvk12280 at gmail.com> wrote:

> 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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>
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