Old 401k rebalance

[MoneyGoal]

Hi,

I have an old existing 401k.
I want to reallocate existing funds into one fund.
Can I do this without any tax implication?
Based on what I read online, seems like it is fine, but I am worried.

Thanks.

[RWD]

Yes, you can buy/sell within a 401k (or other tax sheltered accounts) without any tax consequences.

[MoneyGoal]

Thanks!

[TomTX]

Why do you want to keep the old 401k? Often 401k fees/expenses are high, especially old plans.

Why not roll it into an IRA or your current 401k?

[PDXTabs]

Often 401k fees/expenses are high, especially old plans.

Is there some law of nature that old 401(k)s have higher fees? My old Fidelity 401k is great. I'm very careful not to transfer into my new Transamerica 401k which is horrible. Also, by not transferring into an IRA I allow myself to contribute to a back door Roth IRA.